Remove index_status from the heartbeat.
Remove index_status from the heartbeat.

Because it's not used anywhere.

Change-Id: Id91a3ff452d6fb8c35d1320d32379c009f66581d
Reviewed-on: http://review.couchbase.org/59719
Tested-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>
Reviewed-by: Artem Stemkovski <15a0730a27c69f62ab86f2b6c639fca202166c02@couchbase.com>

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