Add a test spec for a 4x4 cluster layout
Add a test spec for a 4x4 cluster layout

Change-Id: Ie430f0823c429622b7c1479765f6ab6a2ae0c363
Reviewed-on: http://review.couchbase.org/49716
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: thomas anderson <faa2c0189873991686fbb8a0db4c162f340af90c@yahoo.com>
Tested-by: thomas anderson <faa2c0189873991686fbb8a0db4c162f340af90c@yahoo.com>

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