Added more predefined user/profiles
Added more predefined user/profiles

_query - used by the query subsystem
_index - used by the indexing subsystem
_xdcr - used by XDCR

Change-Id: I6e00518ebc03ed3f7cf1efe5fe0a1270be5d6b97
Reviewed-on: http://review.couchbase.org/43147
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>
Reviewed-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

daverigby/kv_engine,cloudrain21/memcached-1,daverigby/memcached,daverigby/kv_engine,owendCB/memcached,couchbase/memcached,daverigby/memcached,daverigby/memcached,jimwwalker/memcached,couchbase/memcached,mrkwse/memcached,daverigby/kv_engine,couchbase/memcached,mrkwse/memcached,daverigby/memcached,couchbase/memcached,cloudrain21/memcached-1,mrkwse/memcached,cloudrain21/memcached-1,owendCB/memcached,jimwwalker/memcached,owendCB/memcached,cloudrain21/memcached-1,daverigby/kv_engine,owendCB/memcached,jimwwalker/memcached,mrkwse/memcached