Fix for ONOS-5152:Encoder for Disjoint Rest API with NPE:onos-1.7

Change-Id: I172e247353f7d70f6d7761e8a6be27f21b3c2684
diff --git a/core/common/src/main/java/org/onosproject/codec/impl/CodecManager.java b/core/common/src/main/java/org/onosproject/codec/impl/CodecManager.java
index da9b8f1..090727f 100644
--- a/core/common/src/main/java/org/onosproject/codec/impl/CodecManager.java
+++ b/core/common/src/main/java/org/onosproject/codec/impl/CodecManager.java
@@ -43,6 +43,7 @@
 import org.onosproject.net.Link;
 import org.onosproject.net.MastershipRole;
 import org.onosproject.net.Path;
+import org.onosproject.net.DisjointPath;
 import org.onosproject.net.Port;
 import org.onosproject.net.device.PortStatistics;
 import org.onosproject.net.driver.Driver;
@@ -123,6 +124,7 @@
         registerCodec(Topology.class, new TopologyCodec());
         registerCodec(TopologyCluster.class, new TopologyClusterCodec());
         registerCodec(Path.class, new PathCodec());
+        registerCodec(DisjointPath.class, new DisjointPathCodec());
         registerCodec(Group.class, new GroupCodec());
         registerCodec(Driver.class, new DriverCodec());
         registerCodec(GroupBucket.class, new GroupBucketCodec());