YANG Derived Data Type Support + Change in YANG Parser Grammar to 
Support String values which are not in double quotes with UT case + 
Addition of Revision Date Validation with UT case + Removal of 
String.valueOf

Change-Id: Ic152265a35c0d2b0f84473a94ca67681cf8efca8
diff --git a/src/test/resources/ContactWithoutQuotes.yang b/src/test/resources/ContactWithoutQuotes.yang
new file mode 100644
index 0000000..20ab72b
--- /dev/null
+++ b/src/test/resources/ContactWithoutQuotes.yang
@@ -0,0 +1,8 @@
+module Test {
+yang-version 1;
+namespace urn:ietf:params:xml:ns:yang:ietf-ospf;
+prefix On;
+organization "IETF SPRING Working Group";
+contact WG;
+}
+