[ONOS-4616] YANG grouping linker issues fixed.

Change-Id: I741aa9ad1008c02c9a9f90cc117cd43729132129
diff --git a/src/main/java/org/onosproject/yangutils/datamodel/YangUses.java b/src/main/java/org/onosproject/yangutils/datamodel/YangUses.java
index f6a5e6b..4eae3a2 100644
--- a/src/main/java/org/onosproject/yangutils/datamodel/YangUses.java
+++ b/src/main/java/org/onosproject/yangutils/datamodel/YangUses.java
@@ -271,8 +271,8 @@
         }
 
         YangNode usesParentNode = getParentNodeInGenCode(this);
-        if ((!(usesParentNode instanceof YangLeavesHolder))
-                || (!(usesParentNode instanceof CollisionDetector))) {
+        if (!(usesParentNode instanceof YangLeavesHolder)
+                || !(usesParentNode instanceof CollisionDetector)) {
             throw new LinkerException("Linker Exception: YANG uses holder construct is wrong");
         }