CBQE-1574: add GOMAXPROCS param to tuq setup

Change-Id: I3b2605a9e77f887f47313001a42f980bedb14f8d
Reviewed-on: http://review.couchbase.org/30986
Reviewed-by: Ketaki Gangal <ketakigangal@gmail.com>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>