config ang key validation and UT for the same

Change-Id: I507740fc9da3f3da5fb3c88a7414f87db6251c5b
diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ListListenerTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ListListenerTest.java
index f552387..0d2d29b 100644
--- a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ListListenerTest.java
+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ListListenerTest.java
@@ -68,7 +68,7 @@
         assertThat(yangList.getName(), is("valid"));
 
         ListIterator<String> keyList = yangList.getKeyList().listIterator();
-        assertThat(keyList.next(), is("invalid"));
+        assertThat(keyList.next(), is("invalid-interval"));
     }
 
     /**
@@ -95,7 +95,7 @@
         // Check whether the list is child of container
         YangList yangList = (YangList) yangContainer.getChild();
         assertThat(yangList.getName(), is("valid"));
-        assertThat(yangList.getKeyList().contains("invalid"), is(true));
+        assertThat(yangList.getKeyList().contains("invalid-interval"), is(true));
     }
 
     /**
@@ -123,7 +123,7 @@
         // Check whether the list is child of list
         YangList yangList = (YangList) yangList1.getChild();
         assertThat(yangList.getName(), is("valid"));
-        assertThat(yangList.getKeyList().contains("invalid"), is(true));
+        assertThat(yangList.getKeyList().contains("invalid-interval"), is(true));
     }
 
     /**
@@ -148,7 +148,7 @@
 
         // Check whether list properties as set correctly.
         assertThat(yangList.getName(), is("ospf"));
-        assertThat(yangList.getKeyList().contains("process-id"), is(true));
+        assertThat(yangList.getKeyList().contains("invalid-interval"), is(true));
 
         assertThat(yangList.isConfig(), is(true));
         assertThat(yangList.getMaxElelements(), is(10));