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

Change-Id: Iba95a07bb1ed6230b9a900448bf294355a58285c
diff --git a/config-models/aether-2.x/files/yang/apn-profile.yang b/config-models/aether-2.x/files/yang/apn-profile.yang
index df18024..9f2125e 100755
--- a/config-models/aether-2.x/files/yang/apn-profile.yang
+++ b/config-models/aether-2.x/files/yang/apn-profile.yang
@@ -20,12 +20,13 @@
   }
 
   // TODO: Think more on whether this should be a UUID or
-  // simply a unique name. If it's a UUID, could fix the 
+  // simply a unique name. If it's a UUID, could fix the
   // string length.
   typedef apn-profile-id {
         type string {
             length 1..32;
         }
+    description "The typedef for apn-profile-id";
   }
 
   container apn-profile {
@@ -46,7 +47,7 @@
             length 1..80;
         }
         description "display name to use in GUI or CLI";
-      }     
+      }
 
       leaf apn-name {
         type string {
@@ -85,7 +86,7 @@
           length 1..100;
         }
         description "description of this profile";
-      }      
+      }
     }
-  } 
+  }
 }