CBQE-2049: Add changes to enable valueOnly/fullEviction on any pytests/*
tests.

Change-Id: I268facbeff7990e8a0d5bd118fbb1b031e82c513
Reviewed-on: http://review.couchbase.org/33776
Reviewed-by: Tommie McAfee <tommie@couchbase.com>
Reviewed-by: Ketaki Gangal <ketakigangal@gmail.com>
Tested-by: Ketaki Gangal <ketakigangal@gmail.com>