Adding OnosCfgMojo to the onos maven plugin.
Removing previously manuall generated files since they are now auto-generated.

Change-Id: I1f8361f97db74c9e2f077b3d5e7a6e65876561ef
diff --git a/providers/pom.xml b/providers/pom.xml
index 4ca6f93..6507acb 100644
--- a/providers/pom.xml
+++ b/providers/pom.xml
@@ -70,6 +70,11 @@
                 <groupId>org.apache.felix</groupId>
                 <artifactId>maven-bundle-plugin</artifactId>
             </plugin>
+
+            <plugin>
+                <groupId>org.onosproject</groupId>
+                <artifactId>onos-maven-plugin</artifactId>
+            </plugin>
         </plugins>
     </build>