Replace test docstrings as comments

Test runners mistakenly display these docstrings which is rather
unhelpful typically..

Change-Id: I3bdbeae852a3dd4619efe818bd65c6ddce7d347a
Reviewed-on: http://review.couchbase.org/29780
Reviewed-by: Volker Mische <volker.mische@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>