Neutron CLI itself is now deprecated. It means a kind of
feature freeze and we don't accept any changes on
adding/changing/dropping the existing commands.
The only exception is bug fixes on the deprecated neutron CLI.
It is better to document our policy on neutron CLI chnages.
Change-Id: I5f063c7eddbc9a91f587d5d3610092d07150f726
25e8ff6712