[doc] Use openstack client command to replace others
[doc] Use openstack client command to replace others

The neutron client commands will be deprecated,
and 'nova net-list' has already been deprecated, so use
openstack client commands to replace neutron client.

Change-Id: Idb7d9782bb3af28cba7e318b0ed664641b5d731f

openstack/trove,openstack/trove