add test spec for 10M items compaction, single bucket
add test spec for 10M items compaction, single bucket

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