[ONOS-5141],[ONOS-5142],[ONOS-5165],[ONOS-4881],[ONOS-4889],[ONOS-5104],[ONOS-5138] defect fixes

Change-Id: I435dc0cf9afae7230fc98b57f33af104e0e38e67
diff --git a/plugin/src/main/java/org/onosproject/yangutils/parser/impl/listeners/DefaultListener.java b/plugin/src/main/java/org/onosproject/yangutils/parser/impl/listeners/DefaultListener.java
index bc7c060..b93fe52 100644
--- a/plugin/src/main/java/org/onosproject/yangutils/parser/impl/listeners/DefaultListener.java
+++ b/plugin/src/main/java/org/onosproject/yangutils/parser/impl/listeners/DefaultListener.java
@@ -46,13 +46,13 @@
 import org.onosproject.yangutils.parser.antlrgencode.GeneratedYangParser;
 import org.onosproject.yangutils.parser.exceptions.ParserException;
 import org.onosproject.yangutils.parser.impl.TreeWalkListener;
-import org.onosproject.yangutils.parser.impl.parserutils.ListenerUtil;
 
 import static org.onosproject.yangutils.datamodel.utils.YangConstructType.DEFAULT_DATA;
 import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.ENTRY;
 import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorMessageConstruction.constructListenerErrorMessage;
 import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.INVALID_HOLDER;
 import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.MISSING_HOLDER;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerUtil.removeQuotesAndHandleConcat;
 import static org.onosproject.yangutils.parser.impl.parserutils.ListenerValidation.checkStackIsNotEmpty;
 
 /**
@@ -83,17 +83,17 @@
         switch (tmpNode.getYangConstructType()) {
             case TYPEDEF_DATA: {
                 YangTypeDef typeDef = (YangTypeDef) tmpNode;
-                typeDef.setDefaultValueInString(ListenerUtil.removeQuotesAndHandleConcat(ctx.string().getText()));
+                typeDef.setDefaultValueInString(removeQuotesAndHandleConcat(ctx.string().getText()));
                 break;
             }
             case LEAF_DATA: {
                 YangLeaf leaf = (YangLeaf) tmpNode;
-                leaf.setDefaultValueInString(ListenerUtil.removeQuotesAndHandleConcat(ctx.string().getText()));
+                leaf.setDefaultValueInString(removeQuotesAndHandleConcat(ctx.string().getText()));
                 break;
             }
             case CHOICE_DATA: {
                 YangChoice choice = (YangChoice) tmpNode;
-                choice.setDefaultValueInString(ListenerUtil.removeQuotesAndHandleConcat(ctx.string().getText()));
+                choice.setDefaultValueInString(removeQuotesAndHandleConcat(ctx.string().getText()));
                 break;
             }
             default: