Updated openstack/openstack
Project: openstack/tempest  fbb3502ad95294b7bf4e216a62166865a6cca67e
null
Convert volume api tests to use global CONF object

This commit takes all the uses of config in the volume api tests
and converts them to use the global CONF object.

Partially implements bp config-cleanup

Change-Id: I258f0b4df1850ab4d2d670c297b9c43b6916d036