Revert "Update a test to work with Quantum SecGroup"

This reverts commit 2c2978703319631f1c0144db05f55dbad3a55c50

The correct patch has been submitted by Melanie Witt here :
https://review.openstack.org/#/c/30815/
Skip list_vifs test with Quantum

Currently Quantum doesn't support all the features provided
by nova-network. Thus some tests related to features not
available in Quantum API must be skipped.

Fix Bug #1183436

Change-Id: I02ece3c49c9852197c7fb22c5025920baf60d98d
Merge "Revert "Update a test to work with Quantum SecGroup""
Merge "Skip list_vifs test with Quantum"