Moving the CLI to python allows for easier
maintenance and larger feature-set.

This patch introduces a few breaking changes!
The changes stem the nature of the cliff package.
- the order of parameters must be
  kolla-ansible <action> <arguments>
- mariadb_backup and mariadb_recovery now are
  mariadb-backup and mariadb-recovery

Closes-bug: #1589020
Signed-off-by: Roman Krček <roman.krcek@tietoevry.com>
Change-Id: I9749b320d4f5eeec601a055b597dfa7d8fb97ce2