MB-9307: Use timeout for rollback call

Change-Id: I1f515e66cfcfb49c7b8af539c51433a4d21d8ccb
Reviewed-on: http://review.couchbase.org/30018
Reviewed-by: Volker Mische <volker.mische@gmail.com>
Tested-by: Volker Mische <volker.mische@gmail.com>