Updated tests to use late-client-creation.

Creating clients after the tests have actually begun,
rather than as they are initializing is a neccessary
step towards supporting asynchronously prepared
configuration information, such as is neccessary when
using mock servers.

Change-Id: Ic087de0ebb85dba4737e4557149dc92c7dd3d8f4
Reviewed-on: http://review.couchbase.org/36041
Reviewed-by: Mark Nunberg <mnunberg@haskalah.org>
Tested-by: Brett Lawson <brett19@gmail.com>