ubuntu/nova: configure notifications using keystone v3
ubuntu/nova: configure notifications using keystone v3

We had to do an exception on Ubuntu because packaging was not updated
and ready to use keystone v3 for nova notifications.

Now packaging is updated, we can drop the exception and be consistent
between both distros.

Depends-On: Ic170d932df53bb1d7bd3b0eda116ad36d0b929c6
Change-Id: I1dfe6494e8048544aca65fb1ca8b0016ea041cc8

openstack/puppet-openstack-integration,openstack/puppet-openstack-integration,openstack/puppet-openstack-integration