As per the doc bug https://bugs.launchpad.net/openstack-manuals/+bug/1363830
documentation for the cinder CLI should be updated to reflect that the host
needs to be given in the form host@backend#pool, and the docs for the
cli-reference are auto-generated from the client.
Change-Id: I66d41e05436782c3acd24f9633c4b67ca5c56b15