CBQE-1902: fix scenariou in restart_cbrecover_multiple_failover_swapout_reb_routine

Change-Id: I8deae3b942976f1dc7fbf340a3458997204bb43d
Reviewed-on: http://review.couchbase.org/33383
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>