Revert "CBQE-0: added new function in xdcrnewbasetests.py and some re-factoring"

This reverts commit 35dcca3da5953823741e1b03657d544be524a280.

Change-Id: Ia468e428d3c70c466ba42d39af9f86a1f1191492
Reviewed-on: http://review.couchbase.org/44646
Reviewed-by: Parag Agarwal <agarwal.parag@gmail.com>
Tested-by: Parag Agarwal <agarwal.parag@gmail.com>