CORD-48 Added support for broadcast next objective in OFDPA driver.
Changed groupid to show in hex for cli command 'groups'

Change-Id: I86474912a9fd775c36d5bc49545eaa58ecc46b47
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 4e5d39a..126e722 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
@@ -630,7 +630,8 @@
         @Override
         public String toString() {
             return toStringHelper(type().toString())
-                    .add("group ID", groupId.id()).toString();
+                    .addValue("group ID=0x" + Integer.toHexString(groupId.id()))
+                    .toString();
         }
 
         @Override