CBQE-0: increase timeout to expect if server is reboot

Change-Id: I5d8c896a2801e7ce98a157e122e1ad2a2a5f8a03
Reviewed-on: http://review.couchbase.org/31229
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>