added-yang-linter-and-resolved-all-error-produced-by it

Change-Id: Iba95a07bb1ed6230b9a900448bf294355a58285c
diff --git a/config-models/aether-4.x/files/yang/onf-vcs.yang b/config-models/aether-4.x/files/yang/onf-vcs.yang
index 9597f9a..c275565 100755
--- a/config-models/aether-4.x/files/yang/onf-vcs.yang
+++ b/config-models/aether-4.x/files/yang/onf-vcs.yang
@@ -29,6 +29,7 @@
         type yg:yang-identifier {
             length 1..32;
         }
+    description "The typedef for vcs-id";
   }
 
   container vcs {
@@ -132,9 +133,9 @@
         type leafref {
           path "/st:site/st:site/st:id";
         }
+	mandatory true;
         description
           "Link to site where this VCS is deployed";
-        mandatory true;
       }
 
       // the following are populated from the template