CORD-348 multicast support in SegmentRouting and vRouter

In this submission:
* Setup/teardown multicast route according to SinkAdded/SinkRemoved event
    - ingressVlan and egressVlan is configurable through network config
* Change behavior of OFDPA VLAN assignment
    - Always use the VLAN in metadata if present
* Bugfix of writing immutable object

NOT in this submission (coming soon):
* Error handling (e.g. link/device failure recovery)

Change-Id: I9be11af04eb2d6456b865c7e59e96cc02370f846
diff --git a/pom.xml b/pom.xml
index beff610..b2db87f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -51,7 +51,11 @@
             <artifactId>onos-cli</artifactId>
             <version>${project.version}</version>
         </dependency>
-
+        <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onos-core-serializers</artifactId>
+            <version>${project.version}</version>
+        </dependency>
         <dependency>
             <groupId>org.apache.karaf.shell</groupId>
             <artifactId>org.apache.karaf.shell.console</artifactId>
@@ -84,12 +88,10 @@
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
         </dependency>
-
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-annotations</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.osgi</groupId>
             <artifactId>org.osgi.compendium</artifactId>
@@ -103,7 +105,6 @@
             <artifactId>onlab-junit</artifactId>
             <scope>test</scope>
         </dependency>
-
         <dependency>
             <groupId>org.onosproject</groupId>
             <artifactId>onos-api</artifactId>