yang choice case translator + whitebox fix

Change-Id: I96f1855bc71a002335946150b51e911ae6ac2fb2
diff --git a/src/main/java/org/onosproject/yangutils/parser/impl/listeners/EnumListener.java b/src/main/java/org/onosproject/yangutils/parser/impl/listeners/EnumListener.java
index 103a7ee..ad2988d 100644
--- a/src/main/java/org/onosproject/yangutils/parser/impl/listeners/EnumListener.java
+++ b/src/main/java/org/onosproject/yangutils/parser/impl/listeners/EnumListener.java
@@ -131,7 +131,7 @@
             switch (tmpNode.getYangConstructType()) {
                 case ENUMERATION_DATA: {
                     YangEnumeration yangEnumeration = (YangEnumeration) tmpNode;
-                    if ((ctx.enumStatementBody() == null) || (ctx.enumStatementBody().valueStatement() == null)) {
+                    if (ctx.enumStatementBody() == null || ctx.enumStatementBody().valueStatement() == null) {
                         int maxValue = 0;
                         boolean isValuePresent = false;