Merge pull request #3636 from edx/diana/disable-flaky-js-test

Disable flaky Javascript test

common/lib/xmodule/xmodule/js/spec/combinedopenended/display_spec.coffee

@@ -81,7 +81,7 @@ describe 'CombinedOpenEnded', ->
       expect(window.setTimeout).toHaveBeenCalledWith(@combined.poll, 10000)
       expect(window.queuePollerID).toBe(5)
 
-    it 'polling stops properly', =>
+    xit 'polling stops properly', =>
       fakeResponseDone = state: "done"
       spyOn($, 'postWithPrefix').andCallFake (url, callback) -> callback(fakeResponseDone)
       @combined.poll()