test_nova.sh uses old cirros images

Update test_nova.sh to download Cirros 0.3.1 for config_drive support,
and for consistency with the other Cirros image downloads within this
module.

Change-Id: Ic022c0199d254c3cadb08ccda1ef588fd3f09c35
Closes-Bug: #1275746
Remove deprecated address from keystone spec

When I57b8469fb816c37c9d6a285c07796f685b121a90 (Remove deprecated
parameter 'address') was merged openstack_keystone_spec.rb broke.
This change removes the use of the deprecated 'address'.

Change-Id: Ib6d74bfc0d13f5c13f523d5d98b4aea60cc4adaf