Integrate tripleo-ansible-inventory into tripleoclient

[Cédric Jeanneret]

Hello there,

It would be good to remove that standalone script (currently in tripleo-validations repository) and move it as an `openstack tripleo' subcommand.

Something like `openstack tripleo inventory', with the same options as the current script, would be really good.

In order to ensure backward compatibility, a dummy "tripleo-ansible-inventory" script should also be pushed. It should just wrap the new command, showing a deprecation warning. This one should also be shipped by the tripleoclient package in order to stay consistent.

Cheers,

C.