Remove individual cfg.CONF.resets from tests
Remove individual cfg.CONF.resets from tests

oslo.config.CONF.reset is added to cleanup in BaseTestCase, so it does
not need to be done by individual test cases.

Change-Id: I5fced5c2d480e78e5bb7cc150f0b653313884456
Closes-Bug: #1291144

stackforge/networking-nec,stackforge/networking-nec,openstack/networking-nec,openstack/networking-nec