CBQE-0: workaround in cbrecovery tests for MB-9707

Change-Id: I3d5dea25c88e2d087b3f6e20d798ee0314cda49d
Reviewed-on: http://review.couchbase.org/34724
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>