Modify bulk collection create api to use new ns server collection apis
Modify bulk collection create api to use new ns server collection
apis

Change-Id: Id7b896c6f5fb9e03a27a348c19f4bf951a7f0c2d
Reviewed-on: http://review.couchbase.org/c/perfrunner/+/150256
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Bo-Chun Wang <bb86fd206c9c35341feb9b50e74a74a83e254d63@couchbase.com>

couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner