[ONOS-3513] Implement PBB I-SID Criterion and test case to Southbound

Change-Id: Ic6836cb7df1eb2d8b871b85029a1a8e31add1289
diff --git a/core/api/src/main/java/org/onosproject/net/flow/criteria/Criteria.java b/core/api/src/main/java/org/onosproject/net/flow/criteria/Criteria.java
index dd31ad4..c94b1e0 100644
--- a/core/api/src/main/java/org/onosproject/net/flow/criteria/Criteria.java
+++ b/core/api/src/main/java/org/onosproject/net/flow/criteria/Criteria.java
@@ -581,6 +581,16 @@
     }
 
     /**
+     * Creates a match on PBB I-SID field using the specific value.
+     *
+     * @param pbbIsid PBB I-SID
+     * @return match criterion
+     */
+    public static Criterion matchPbbIsid(int pbbIsid) {
+        return new PbbIsidCriterion(pbbIsid);
+    }
+
+    /**
      * Creates an extension criterion for the specified extension selector.
      *
      * @param extensionSelector extension selector