[install] Use openstack instead of neutron client
[install] Use openstack instead of neutron client

I have also updated the output of the command.

Change-Id: Iaa16c2e589d509d1efe603325c5634c8b20b39d6

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