[ONOS-4650][ONOS-4726][ONOS-4727] [ONOS-4728]Implement must parser + when parser + feature + if-feature + revision defect fix

Change-Id: I0a3aee6c1c6b72ef7da7f7f565fd0f149fe3fd42
diff --git a/plugin/src/test/resources/MultipleRevision.yang b/plugin/src/test/resources/MultipleRevision.yang
new file mode 100755
index 0000000..4ce440c
--- /dev/null
+++ b/plugin/src/test/resources/MultipleRevision.yang
@@ -0,0 +1,26 @@
+module Test {
+    yang-version 1;
+    namespace urn:ietf:params:xml:ns:yang:ietf-ospf;
+    prefix test;
+
+     revision 2013-07-15 {
+       description
+        "This revision adds the following new data types:
+         - yang-identifier
+         - hex-string
+         - uuid
+         - dotted-quad";
+       reference
+        "RFC 6991: Common YANG Data Types";
+     }
+     revision 2013-07-14 {
+       description
+        "This revision adds the following new data types:
+         - yang-identifier
+         - hex-string
+         - uuid
+         - dotted-quad";
+       reference
+        "RFC 6991: Common YANG Data Types";
+     }
+}