CBD-915: add untuned litmus configs

Change-Id: Id04e4cdcb16fecf270e66023ac9c9d84d230ba7d
Reviewed-on: http://review.couchbase.org/25414
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Ronnie Sun <ronnie@couchbase.com>
MB-100: make vperf config time-driven

Change-Id: I45a68f7062c12e4ec842a11fbc326a22c30d745c
Reviewed-on: http://review.couchbase.org/25443
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Pavel Paulau <pavel.paulau@gmail.com>