CBQE-0: minor fix in restart_cbrecover_multiple_failover_swapout_reb_routine

Change-Id: I04f628e84901a630d86b719d94db36d5f6136f95
Reviewed-on: http://review.couchbase.org/33385
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>