[ONOS-4636]YANG Grouping linking bug fix + YANG Code review comment fix

Change-Id: I68ee8dd08266a02593e217cef1a9bb010037d673
diff --git a/src/test/java/org/onosproject/yangutils/parser/impl/TreeWalkListenerTest.java b/src/test/java/org/onosproject/yangutils/parser/impl/TreeWalkListenerTest.java
index 874f8ed..1056d98 100644
--- a/src/test/java/org/onosproject/yangutils/parser/impl/TreeWalkListenerTest.java
+++ b/src/test/java/org/onosproject/yangutils/parser/impl/TreeWalkListenerTest.java
@@ -32,6 +32,7 @@
 
     @Rule
     public ExpectedException thrown = ExpectedException.none();
+
     /**
      * Checks whether exception is thrown for ordered statement.
      */