CBQE-0: minor fixes in cbRecoverytests.py

Change-Id: If97f753c645660c79360d17a9930032fd1c11c95
Reviewed-on: http://review.couchbase.org/32731
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>