Schedule less operations for jscbc-14 tests

LCB is somewhat broken and 6k ops is plenty

Change-Id: I892de7aa95716b8954d2d4ffe986d0c7dd2ea980
Reviewed-on: http://review.couchbase.org/28617
Reviewed-by: Brett Lawson <brett19@gmail.com>
Reviewed-by: Mark Nunberg <mnunberg@haskalah.org>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>