MB-14300 change common prefix to GSI DCP streams to secidx:
MB-14300 change common prefix to GSI DCP streams to secidx:

in complience with http://review.couchbase.org/53804/

Change-Id: I1d06b50a5c5a168cc9253ec3773ff413170a0a68
Reviewed-on: http://review.couchbase.org/53619
Tested-by: Artem Stemkovski <15a0730a27c69f62ab86f2b6c639fca202166c02@couchbase.com>
Reviewed-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>

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