[ONOS-4115] Support flow table pipeline for REST API

This commit adds capability to handle Table type in
InstructionCodec.

Change-Id: I82f1abf9f7ed17df3885746e8c24223190dd216f
diff --git a/core/api/src/main/java/org/onosproject/net/flow/instructions/Instructions.java b/core/api/src/main/java/org/onosproject/net/flow/instructions/Instructions.java
index aef755f..e1a71fc 100644
--- a/core/api/src/main/java/org/onosproject/net/flow/instructions/Instructions.java
+++ b/core/api/src/main/java/org/onosproject/net/flow/instructions/Instructions.java
@@ -103,6 +103,12 @@
         return new SetQueueInstruction(queueId, port);
     }
 
+    /**
+     * Creates a meter instruction.
+     *
+     * @param meterId Meter Id
+     * @return meter instruction
+     */
     public static MeterInstruction meterTraffic(final MeterId meterId) {
         checkNotNull(meterId, "meter id cannot be null");
         return new MeterInstruction(meterId);