Use V3 auth_url
Use V3 auth_url

When executing 'murano environment create test' command, the result
is failed because keystone has delete V2 api. Therefore murano need
to use V3 auth_url.

Change-Id: Ia9874949c0e7bdef733815ae6d37a3f19784abe3
Co-Authored-By: zhurong <ad21576fe67713d4a28e4f2ae756b7b87a629e19@gmail.com>

openstack/murano,openstack/murano