Align to generic password auth-type
Align to generic password auth-type

v2password can't handle v3 parameter names. But we align to those
for sanity. Ensure that a user gets the v2plugin that can handle
the auth instead of the one that can't.

Change-Id: Ie693e613fd5d0e20a4837923300502b1de02364b

switch-ch/os-client-config,openstack/python-openstacksdk,dtroyer/python-openstacksdk,openstack/os-client-config,redhat-openstack/os-client-config,stackforge/python-openstacksdk,openstack/python-openstacksdk,stackforge/python-openstacksdk,dtroyer/os-client-config,dtroyer/python-openstacksdk