use single cbmonitor host_port parameter in agents
use single cbmonitor host_port parameter in agents

Change-Id: I95d553712db7512df751ebe890d022793f33cbfa
Reviewed-on: http://review.couchbase.org/27293
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Pavel Paulau <dd88eded64e90046a680e3a6c0828ceb8fe8a0e7@gmail.com>

couchbase/cbmonitor,couchbase/cbmonitor