neutron: switch auth_uri to uri_no_suffix
neutron: switch auth_uri to uri_no_suffix

Switch Neutron to use auth_uri with keystone versionless endpoint, also
for notifications with Nova.

Change-Id: I530e3dcdfe6961e14755a63767c1fb5c0e1cfa22
Partial-implement: blueprint keystone-v3

openstack/tripleo-heat-templates,dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates