- Starting from version 2.0 ansible has 'callback_whitelist =
  profile_tasks'. It allows to analyze CI to find some time regressions.
- Add skippy to CI's ansible.cfg

Signed-off-by: Sergii Golovatiuk <sgolovatiuk@mirantis.com>

It removes the teal lines when a host is skipped for a task. This makes the output less spammy and much easier to read. Empty TASK blocks are still included in the output, but that's ok.

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>