Cherry pick ONOS-4835 fix

Change-Id: I82ecb542dad4430d55af0fc684f8d13d6e45b45e
diff --git a/web/api/src/main/resources/definitions/GroupsPost.json b/web/api/src/main/resources/definitions/GroupsPost.json
index 7ea7b50..203e2e4 100644
--- a/web/api/src/main/resources/definitions/GroupsPost.json
+++ b/web/api/src/main/resources/definitions/GroupsPost.json
@@ -3,7 +3,6 @@
   "title": "group",
   "required": [
     "type",
-    "deviceId",
     "appCookie",
     "groupId",
     "buckets"
@@ -13,10 +12,6 @@
       "type": "string",
       "example": "ALL"
     },
-    "deviceId": {
-      "type": "string",
-      "example": "of:0000000000000001"
-    },
     "appCookie": {
       "type": "string",
       "description": "application cookie. Arbitrary length byte array represented in hex string",
@@ -82,4 +77,4 @@
       }
     }
   }
-}
\ No newline at end of file
+}