Update the "nova" command to "openstack"
Update the "nova" command to "openstack"

Change-Id: I1a8eeda525912f865a87fa4035e56e6b98fa31e5
Implements: blueprint use-openstack-command

openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals