Updated openstack/openstack
Project: openstack/neutron  59c078f83af30bb70a62e295d98ec2796cd6bf89
null
Use base.BaseTestCase in NVP config test

BaseTestCase setup stdout/stderr capture and
it is better to be used.

Change-Id: I3537a633125e5e474fda660581f41e5f57af26ca
Closes-Bug: 1262550