[ONOS-4351][ONOS-4524] Augment linking and defect fixed.

Change-Id: I7c8e8c90579eea4631e014c4906a543a3c249427
diff --git a/src/main/java/org/onosproject/yangutils/datamodel/YangContainer.java b/src/main/java/org/onosproject/yangutils/datamodel/YangContainer.java
index 5941837..3930433 100644
--- a/src/main/java/org/onosproject/yangutils/datamodel/YangContainer.java
+++ b/src/main/java/org/onosproject/yangutils/datamodel/YangContainer.java
@@ -87,7 +87,8 @@
 /**
  * Represents data model node to maintain information defined in YANG container.
  */
-public class YangContainer extends YangNode implements YangLeavesHolder, YangCommonInfo, Parsable, CollisionDetector {
+public class YangContainer extends YangNode
+        implements YangLeavesHolder, YangCommonInfo, Parsable, CollisionDetector, YangAugmentationHolder {
 
     /**
      * Name of the container.