[ONOS-5198] Generated Enum class modifications

Change-Id: I62a9811ee9e695d96a42c44fecfc3c3beeb71b96
diff --git a/plugin/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java b/plugin/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java
index 8b323bc..5de5b1c 100644
--- a/plugin/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java
+++ b/plugin/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java
@@ -302,6 +302,21 @@
     public static final String SPACE = " ";
 
     /**
+     * Static attribute for schema name.
+     */
+    public static final String SCHEMA_NAME = "schemaName";
+
+    /**
+     * Static attribute for schema name value.
+     */
+    public static final String STR_VAL = "stringValue";
+
+    /**
+     * Static attribute for value of method.
+     */
+    public static final String VALUE_OF = "valueOf";
+
+    /**
      * Static attribute for validateRange.
      */
     public static final String VALIDATE_RANGE = "validateRange";