[ONOS-4894][ONOS-4890][ONOS-4887][ONOS-4923]extension and argument
datamodel and listener + defect fix

Change-Id: Icefe046d9848935bb6c40a6d7688feb084edd65d
diff --git a/plugin/src/test/resources/usesInsideChildOfGrouping/ietf-network.yang b/plugin/src/test/resources/usesInsideChildOfGrouping/ietf-network.yang
new file mode 100644
index 0000000..8fb2bc0
--- /dev/null
+++ b/plugin/src/test/resources/usesInsideChildOfGrouping/ietf-network.yang
@@ -0,0 +1,28 @@
+module ietf-network {
+    yang-version 1;
+    namespace "urn:ietf:params:xml:ns:yang:ietf-network";
+    prefix nd;
+
+    revision 2015-12-08 {
+       description
+         "Initial revision.
+          NOTE TO RFC EDITOR: Please replace the following reference
+          to draft-ietf-i2rs-yang-network-topo-02 with
+          RFC number when published (i.e. RFC xxxx).";
+    }
+
+    container networks {
+        list network {
+            key "network-id";
+            leaf network-id {
+                type string;
+            }
+            list node {
+                key "node-id";
+                leaf node-id {
+                    type string;
+                }
+            }
+        }
+    }
+}