[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/utils/yangutils/plugin/src/test/resources/SelfFileLinkingWithFeatureUndefined.yang b/utils/yangutils/plugin/src/test/resources/SelfFileLinkingWithFeatureUndefined.yang
new file mode 100644
index 0000000..f55c61a
--- /dev/null
+++ b/utils/yangutils/plugin/src/test/resources/SelfFileLinkingWithFeatureUndefined.yang
@@ -0,0 +1,17 @@
+module syslog {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix "sys";
+
+    container speed {
+        leaf local-storage-limit {
+            if-feature local-storage;
+            type uint64;
+            units "kilobyte";
+            config false;
+            description
+                 "The amount of local storage that can be
+                  used to hold syslog messages.";
+        }
+    }
+}