Restructure ProtoBuf & gRPC project structure

- pom.xml {protobuf, grpc}-dependencies to consolidte
  plugin configuration, dependency version property

- {protobuf, grpc}: ONOS App to load required feature/bundle

- all other atrifacts: Apps using protobuf/grpc inherit
  ~-dependencies above to reduce copy & paste configurations and
  dependency versions.

Change-Id: Ied90aff78ffddac6228d46e85e01d035eec37bee
diff --git a/incubator/rpc-grpc/pom.xml b/incubator/rpc-grpc/pom.xml
index d6eb5d5..f11580c 100644
--- a/incubator/rpc-grpc/pom.xml
+++ b/incubator/rpc-grpc/pom.xml
@@ -17,9 +17,10 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <parent>
-        <artifactId>onos-incubator</artifactId>
+        <artifactId>onos-incubator-grpc-dependencies</artifactId>
         <groupId>org.onosproject</groupId>
         <version>1.9.0-SNAPSHOT</version>
+        <relativePath>../grpc-dependencies/pom.xml</relativePath>
     </parent>
 
     <artifactId>onos-incubator-rpc-grpc</artifactId>
@@ -36,41 +37,40 @@
             org.onosproject.incubator.protobuf,
             org.onosproject.incubator.grpc
         </onos.app.requires>
-        <protobuf.version>3.0.0</protobuf.version>
-        <grpc.version>1.0.0</grpc.version>
-        <grpc.netty.version>4.1.3.Final</grpc.netty.version>
     </properties>
 
     <dependencies>
         <dependency>
             <groupId>org.onosproject</groupId>
             <artifactId>onos-api</artifactId>
+            <version>${project.version}</version>
         </dependency>
 
         <dependency>
             <groupId>org.onosproject</groupId>
             <artifactId>onos-incubator-api</artifactId>
+            <version>${project.version}</version>
         </dependency>
 
         <dependency>
             <groupId>org.onosproject</groupId>
             <artifactId>onlab-osgi</artifactId>
+            <version>${project.version}</version>
         </dependency>
 
         <dependency>
             <groupId>io.grpc</groupId>
             <artifactId>grpc-core</artifactId>
-            <version>${grpc.version}</version>
         </dependency>
+
         <dependency>
             <groupId>io.grpc</groupId>
             <artifactId>grpc-protobuf</artifactId>
-            <version>${grpc.version}</version>
         </dependency>
+
         <dependency>
             <groupId>io.grpc</groupId>
             <artifactId>grpc-stub</artifactId>
-            <version>${grpc.version}</version>
         </dependency>
 
         <dependency>
@@ -82,12 +82,20 @@
         <dependency>
             <groupId>org.onosproject</groupId>
             <artifactId>onos-api</artifactId>
+            <version>${project.version}</version>
             <scope>test</scope>
             <classifier>tests</classifier>
         </dependency>
 
         <dependency>
             <groupId>org.onosproject</groupId>
+            <artifactId>onlab-junit</artifactId>
+            <version>${project.version}</version>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.onosproject</groupId>
             <artifactId>onos-incubator-protobuf</artifactId>
             <version>${project.version}</version>
         </dependency>
@@ -99,6 +107,16 @@
         </dependency>
 
         <dependency>
+            <groupId>org.osgi</groupId>
+            <artifactId>org.osgi.core</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.osgi</groupId>
+            <artifactId>org.osgi.compendium</artifactId>
+        </dependency>
+
+        <dependency>
             <groupId>org.apache.felix</groupId>
             <artifactId>org.apache.felix.scr.annotations</artifactId>
             <scope>provided</scope>
@@ -107,13 +125,6 @@
     </dependencies>
 
     <build>
-        <extensions>
-            <extension>
-                <groupId>kr.motd.maven</groupId>
-                <artifactId>os-maven-plugin</artifactId>
-                <version>1.4.1.Final</version>
-            </extension>
-        </extensions>
 
         <pluginManagement>
             <plugins>
@@ -151,22 +162,6 @@
             <plugin>
                 <groupId>org.apache.felix</groupId>
                 <artifactId>maven-scr-plugin</artifactId>
-                <executions>
-                    <execution>
-                        <id>generate-scr-srcdescriptor</id>
-                        <goals>
-                            <goal>scr</goal>
-                        </goals>
-                    </execution>
-                </executions>
-                <configuration>
-                    <!-- avoid searching into wrong source path -->
-                    <scanClasses>true</scanClasses>
-                    <supportedProjectTypes>
-                        <supportedProjectType>bundle</supportedProjectType>
-                        <supportedProjectType>war</supportedProjectType>
-                    </supportedProjectTypes>
-                </configuration>
             </plugin>
             <plugin>
                 <groupId>org.onosproject</groupId>
@@ -176,77 +171,14 @@
             <plugin>
                 <groupId>org.xolstice.maven.plugins</groupId>
                 <artifactId>protobuf-maven-plugin</artifactId>
-                <version>0.5.0</version>
-                <configuration>
-                    <!-- The version of protoc must match protobuf-java. If you don't 
-                        depend on protobuf-java directly, you will be transitively depending on the 
-                        protobuf-java version that grpc depends on. -->
-                    <protocArtifact>com.google.protobuf:protoc:${protobuf.version}:exe:${os.detected.classifier}</protocArtifact>
-                    <pluginId>grpc-java</pluginId>
-                    <pluginArtifact>io.grpc:protoc-gen-grpc-java:${grpc.version}:exe:${os.detected.classifier}</pluginArtifact>
-                </configuration>
-                <executions>
-                    <execution>
-                        <goals>
-                            <goal>compile</goal>
-                            <goal>compile-custom</goal>
-                        </goals>
-                    </execution>
-                </executions>
             </plugin>
 
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>build-helper-maven-plugin</artifactId>
-                <version>1.11</version>
-                <executions>
-                    <execution>
-                        <id>add-source</id>
-                        <phase>generate-sources</phase>
-                        <goals>
-                            <goal>add-source</goal>
-                        </goals>
-                        <configuration>
-                            <sources>
-                                <source>${project.build.directory}/generated-sources/protobuf/java</source>
-                                <source>${project.build.directory}/generated-sources/protobuf/grpc-java</source>
-                            </sources>
-                        </configuration>
-                    </execution>
-                </executions>
             </plugin>
         </plugins>
     </build>
 
-    <!-- gRPC requires more recent version of netty -->
-    <dependencyManagement>
-        <dependencies>
-            <dependency>
-                <groupId>io.netty</groupId>
-                <artifactId>netty-codec</artifactId>
-                <version>${grpc.netty.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>io.netty</groupId>
-                <artifactId>netty-transport</artifactId>
-                <version>${grpc.netty.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>io.netty</groupId>
-                <artifactId>netty-handler</artifactId>
-                <version>${grpc.netty.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>io.netty</groupId>
-                <artifactId>netty-buffer</artifactId>
-                <version>${grpc.netty.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>io.netty</groupId>
-                <artifactId>netty-common</artifactId>
-                <version>${grpc.netty.version}</version>
-            </dependency>
-        </dependencies>
-    </dependencyManagement>
 
 </project>