[rebuild_replicas] Sleep for 10 seconds after the rebalances.
[rebuild_replicas] Sleep for 10 seconds after the rebalances.

This is to prevent mb_master from restarting if the server doesn't have
this fix:: http://review.couchbase.org/64083.

mb_master_sup's restart policy is {one_for_one, 3, 10}, so just sleeping
for 10 seconds after two ns_orchestrator crashes should prevent
mb_master_sup from propagating the crash up to mb_master itself.

Change-Id: I5649cc2d168a9796c3a4f8e30f7d34e466a22342
Reviewed-on: http://review.couchbase.org/64545
Tested-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>
Reviewed-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>

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