Test base_url works with an unversioned endpoint
Test base_url works with an unversioned endpoint

Add a test for previously merged patch to ensure that endpoints in the
service catalog that do not have a version in the URL correctly add the
version.

Original Patch: I931f0c558aafc8dfaa5519744c6e4e7fcffc3205
Related-Bug: #1552475

Change-Id: I992874f9f0b0c192e5ac58b97ca14cd3c4e5e0a0

Juniper/tempest,cisco-openstack/tempest,LIS/lis-tempest,Tesora/tesora-tempest,bigswitch/tempest,Juniper/tempest,sebrandon1/tempest,cisco-openstack/tempest,bigswitch/tempest,openstack/tempest,sebrandon1/tempest,openstack/tempest,zsoltdudas/lis-tempest,zsoltdudas/lis-tempest,LIS/lis-tempest,masayukig/tempest,masayukig/tempest,vedujoshi/tempest,Tesora/tesora-tempest,vedujoshi/tempest