Use specific SERIESLY option instead of CBMONITOR
Use specific SERIESLY option instead of CBMONITOR

When instantiating a Seriesly instance in MetricHelper, use the
SERIESLY parameter instead of CBMONITOR, so we connect to the correct
host when the two settings are different.

Change-Id: I5ff7c35200f958c8aea2b0a827e32547b3bcd5c9
Reviewed-on: http://review.couchbase.org/40375
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Pavel Paulau <dd88eded64e90046a680e3a6c0828ceb8fe8a0e7@gmail.com>

thomas-couchbase/perfrunner,EricACooper/perfrunner,couchbase/perfrunner,mikewied/perfrunner,EricACooper/perfrunner,dkao-cb/perfrunner,EricACooper/perfrunner,pavel-paulau/perfrunner,EricACooper/perfrunner,couchbase/perfrunner,couchbase/perfrunner,pavel-paulau/perfrunner,PaintScratcher/perfrunner,PaintScratcher/perfrunner,pavel-paulau/perfrunner,couchbase/perfrunner,hsharsha/perfrunner,dkao-cb/perfrunner,couchbase/perfrunner,pavel-paulau/perfrunner,mikewied/perfrunner,couchbase/perfrunner,pavel-paulau/perfrunner,vmx/perfrunner,vmx/perfrunner,hsharsha/perfrunner,thomas-couchbase/perfrunner