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

Change-Id: Iba95a07bb1ed6230b9a900448bf294355a58285c
diff --git a/config-models/aether-3.x/files/yang/ip-domain.yang b/config-models/aether-3.x/files/yang/ip-domain.yang
index 7f2bf73..9efd41d 100755
--- a/config-models/aether-3.x/files/yang/ip-domain.yang
+++ b/config-models/aether-3.x/files/yang/ip-domain.yang
@@ -27,6 +27,7 @@
         type yg:yang-identifier {
             length 1..32;
         }
+    description "The typedef for ip-domain-id";
   }
 
   container ip-domain {
@@ -52,7 +53,7 @@
       leaf dnn {
         type at:dnn;
         description "DNN/APN";
-      }      
+      }
 
       leaf dns-primary {
         type inet:ip-address;
@@ -80,7 +81,7 @@
       leaf mtu {
         type at:mtu;
         description "maximum transmission unit";
-      }           
+      }
 
       leaf description {
         type at:description;
@@ -96,7 +97,7 @@
         mandatory true;
         description
           "Link to enterprise that owns this IP-Domain";
-      }         
+      }
     }
-  } 
+  }
 }