Always pull regions from vendor profiles
Always pull regions from vendor profiles

Regions are special, since they're a driver for creating a cloud
config object in the first place. We weren't syncing them from
the vendor profile, so if the region wasn't set in the clouds.yaml,
region name validation (and get_all_clouds) would fail.

Change-Id: I5b8d6807a86b87a7f69f523f2fee2784389fab0a

stackforge/python-openstacksdk,dtroyer/os-client-config,dtroyer/python-openstacksdk,openstack/python-openstacksdk,dtroyer/python-openstacksdk,openstack/python-openstacksdk,stackforge/python-openstacksdk,openstack/os-client-config