MB-15656 Allow setting timeouts for tasks.
MB-15656 Allow setting timeouts for tasks.

And use this strategically.

Change-Id: Id8aed33289c334274d1b1c3c8fc733747fbb12f6
Reviewed-on: http://review.couchbase.org/55513
Tested-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>
Reviewed-by: Artem Stemkovski <15a0730a27c69f62ab86f2b6c639fca202166c02@couchbase.com>

ceejatec/ns_server,ceejatec/ns_server,membase/ns_server,ceejatec/ns_server,membase/ns_server,ceejatec/ns_server,membase/ns_server,membase/ns_server,ceejatec/ns_server,membase/ns_server,ceejatec/ns_server,membase/ns_server