Fixed decode of YANG presence container with YCH

Change-Id: I3bd323dcdc84771da310ebb19d1573f7cf5252ba
diff --git a/apps/yms/app/src/main/java/org/onosproject/yms/app/ydt/YdtNodeFactory.java b/apps/yms/app/src/main/java/org/onosproject/yms/app/ydt/YdtNodeFactory.java
index aa84cea..7fe6f95 100644
--- a/apps/yms/app/src/main/java/org/onosproject/yms/app/ydt/YdtNodeFactory.java
+++ b/apps/yms/app/src/main/java/org/onosproject/yms/app/ydt/YdtNodeFactory.java
@@ -186,6 +186,19 @@
                         throw new YdtException(E_MULTI_INS);
                 }
 
+            case EMPTY_CONTAINER:
+                switch (nodeType) {
+
+                case YANG_SINGLE_INSTANCE_NODE:
+                    return new YdtSingleInstanceNode(node);
+
+                case YANG_SINGLE_INSTANCE_LEAF_NODE:
+                    return new YdtSingleInstanceLeafNode(node);
+
+                default:
+                    return null;
+            }
+
             default:
                 return null;
         }