[ONOS-4955] Defect fixes

Change-Id: Ib12eabac2536e3a0e9871afdbb593e6efb4ddca7
diff --git a/plugin/src/main/java/org/onosproject/yangutils/linker/impl/YangResolutionInfoImpl.java b/plugin/src/main/java/org/onosproject/yangutils/linker/impl/YangResolutionInfoImpl.java
index f40f6ff..f0d4608 100644
--- a/plugin/src/main/java/org/onosproject/yangutils/linker/impl/YangResolutionInfoImpl.java
+++ b/plugin/src/main/java/org/onosproject/yangutils/linker/impl/YangResolutionInfoImpl.java
@@ -1256,13 +1256,13 @@
                 } else {
                     throw new LinkerException("Invalid target node type " + targetNode.getNodeType() + " for "
                             + augment.getName() + " for " + targetNode.getName() +
-                            "in " + targetNode.getLineNumber()
+                            " in " + targetNode.getLineNumber()
                             + " at " + targetNode.getCharPosition() +
                             " in " + targetNode.getFileName());
                 }
             } else {
                 throw new LinkerException("Failed to link " + augment.getName() +
-                        "in " + augment.getLineNumber()
+                        " in " + augment.getLineNumber()
                         + " at " + augment.getCharPosition() +
                         " in " + augment.getFileName());
             }
diff --git a/plugin/src/main/java/org/onosproject/yangutils/parser/impl/listeners/AugmentListener.java b/plugin/src/main/java/org/onosproject/yangutils/parser/impl/listeners/AugmentListener.java
index 2717e74..124f275 100644
--- a/plugin/src/main/java/org/onosproject/yangutils/parser/impl/listeners/AugmentListener.java
+++ b/plugin/src/main/java/org/onosproject/yangutils/parser/impl/listeners/AugmentListener.java
@@ -115,7 +115,7 @@
         detectCollidingChildUtil(listener, line, charPositionInLine, "", AUGMENT_DATA);
 
         Parsable curData = listener.getParsedDataStack().peek();
-        if (curData instanceof YangModule || curData instanceof YangSubModule || curData instanceof YangUses) {
+        if (curData instanceof YangModule || curData instanceof YangSubModule) {
             YangNode curNode = (YangNode) curData;
             YangAugment yangAugment = getYangAugmentNode(JAVA_GENERATION);
             yangAugment.setLineNumber(line);
@@ -141,7 +141,11 @@
                     charPositionInLine);
             addToResolutionList(resolutionInfo, ctx);
 
-        } else {
+        } else if (curData instanceof YangUses) {
+            throw new ParserException(constructListenerErrorMessage(UNHANDLED_PARSED_DATA, AUGMENT_DATA,
+                    ctx.augment().getText(), ENTRY));
+        }
+        else {
             throw new ParserException(constructListenerErrorMessage(INVALID_HOLDER, AUGMENT_DATA,
                     ctx.augment().getText(), ENTRY));
         }