Sporadic "Rebalance In with ops" make simple-test failure

12:35:37 [2017-02-02 12:35:37,055] - [rest_client:2703] ERROR - {u'node': u'n_0@127.0.0.1', u'code': 2, u'text': u'Rebalance exited with reason {unexpected_exit,\n                              {\'EXIT\',<0.27138.0>,\n                               {dcp_wait_for_data_move_failed,"default",799,\n                                \'n_0@127.0.0.1\',\n                                [\'n_3@127.0.0.1\'],\n                                {error,no_stats_for_this_vbucket}}}}\n', u'shortText': u'message', u'serverTime': u'2017-02-02T12:35:26.859Z', u'module': u'ns_orchestrator', u'tstamp': 1486067726859, u'type': u'info'}