Identifier issue fix for module, list, container, leaf, leaf-list, prefix + date agr string for revision fix

Change-Id: Id9d596512f35b54f6359d361402bcd0180b71678
diff --git a/src/test/java/org/onosproject/yangutils/parser/impl/listeners/LeafListenerTest.java b/src/test/java/org/onosproject/yangutils/parser/impl/listeners/LeafListenerTest.java
index 40afc03..554d651 100644
--- a/src/test/java/org/onosproject/yangutils/parser/impl/listeners/LeafListenerTest.java
+++ b/src/test/java/org/onosproject/yangutils/parser/impl/listeners/LeafListenerTest.java
@@ -85,7 +85,7 @@
     @Test
     public void processLeafInvalidIdentifier() throws IOException, ParserException {
         thrown.expect(ParserException.class);
-        thrown.expectMessage("mismatched input '1invalid-interval' expecting IDENTIFIER");
+        thrown.expectMessage("YANG file error : leaf name 1invalid-interval is not valid.");
         YangNode node = manager.getDataModel("src/test/resources/LeafInvalidIdentifier.yang");
     }