Put in magnumclient service_type workaround
Put in magnumclient service_type workaround

Older versions of os-client-config only have an api version for
'container'. It's pretty easy to put in a workaround for that.

Change-Id: I1edaa7ee416e4cc85bffb999a0e66b9494dabc37

openstack/python-openstacksdk,stackforge/python-openstacksdk,dtroyer/python-openstacksdk,openstack-infra/shade,openstack/python-openstacksdk,dtroyer/python-openstacksdk,stackforge/python-openstacksdk,openstack-infra/shade