This allows us to continue execution until a certain proportion of hosts
to fail. This can be useful at scale, where failures are common, and
restarting a deployment is time-consuming.

The default max failure percentage is 100, keeping the default
behaviour. A global max failure percentage may be set via
kolla_max_fail_percentage, and individual services may define a max
failure percentage via <service>_max_fail_percentage.

Note that all hosts in the inventory must be reachable for fact
gathering, even those not included in a --limit.

Closes-Bug: #1833737
Change-Id: I808474a75c0f0e8b539dc0421374b06cea44be4f

Change-Id: I44c2668a8ebb6dd3201a6eb4e47284871380e6d7

The cleanup command in the external API is a misnomer and should
be called destroy.

Change-Id: I083e80699e09bb24266ce1bf549772a5de92a49e
Closes-Bug: 1610364

Change-Id: I5f422574d7e50ec9a1e5862b66ecbf39fe1594d2
Closes-Bug: #1531721
Implements: blueprint ansible-cleanup-role

Throughout the project overtime some of these file permissions have
changed to have an executable bit. They should not have this bit set.

TrivialFix

Change-Id: I1748b5bde813a0fcac36aeecdfd83245b8ee5be3

This playbook runs on hosts before deployment to be sure we don't
have any conflicting services running and systems are in expected
state.

DocImpact

Change-Id: If5f288b7fbdf269697ca834da4eb969b61683ca0
Partially-implements: blueprint precheck-tasks