race between DatabasesCloner::_succeed_inlock and DataReplicator::_doNextActions_InitialSync_inlock() could prevent initial sync from completing

[js_test:rename_collection_temp] 2016-11-10T20:51:43.995+0000 d20261| 2016-11-10T20:51:43.994+0000 I REPL     [repl writer worker 15] data clone finished, status: OK

[js_test:rename_collection_temp] 2016-11-10T20:51:43.995+0000 d20261| 2016-11-10T20:51:43.995+0000 I REPL     [replication-0] No need to apply operations. (currently at { : Timestamp 1478811101000|1 })

2016-11-10 20:51:45 +0000	

[js_test:rename_collection_temp] 2016-11-10T20:51:45.750+0000 d20261| 2016-11-10T20:51:45.749+0000 I REPL     [ReplicationExecutor] Member ip-10-37-182-112:20260 is now in state PRIMARY

2016-11-10 20:52:43 +0000	

[js_test:rename_collection_temp] 2016-11-10T20:52:43.995+0000 d20260| 2016-11-10T20:52:43.995+0000 I -        [conn4] end connection 10.37.182.112:46555 (4 connections now open)

2016-11-10 21:01:42 +0000	

[js_test:rename_collection_temp] 2016-11-10T21:01:42.018+0000 assert.soon failed, msg:Awaiting secondaries