Test for COUCHBASE_PYTHON

Change-Id: Ife348508445d5e2dac222a30f990895edda1106d
Reviewed-on: http://review.couchbase.org/29290
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>