[ONOS-5142] [ONOS-5137] defect fixes

Change-Id: I2856a7a41b242b16c981915dd97986aa9c6ab676
diff --git a/plugin/src/main/java/org/onosproject/yangutils/linker/impl/YangXpathLinker.java b/plugin/src/main/java/org/onosproject/yangutils/linker/impl/YangXpathLinker.java
index 89d2dbe..d77fe7d 100644
--- a/plugin/src/main/java/org/onosproject/yangutils/linker/impl/YangXpathLinker.java
+++ b/plugin/src/main/java/org/onosproject/yangutils/linker/impl/YangXpathLinker.java
@@ -313,7 +313,7 @@
      */
     private YangLeaf searchReferredLeaf(YangNode targetNode, String leafName) {
         if (!(targetNode instanceof YangLeavesHolder)) {
-            throw new LinkerException("Refered node " + targetNode.getName() +
+            throw new LinkerException("Referred node " + targetNode.getName() +
                     "should be of type leaves holder ");
         }
         YangLeavesHolder holder = (YangLeavesHolder) targetNode;
@@ -337,7 +337,7 @@
      */
     private YangLeafList searchReferredLeafList(YangNode targetNode, String leafListName) {
         if (!(targetNode instanceof YangLeavesHolder)) {
-            throw new LinkerException("Refered node " + targetNode.getName() +
+            throw new LinkerException("Referred node " + targetNode.getName() +
                     "should be of type leaves holder ");
         }
         YangLeavesHolder holder = (YangLeavesHolder) targetNode;