Add ability to enable ucp audit logs

Allow to configure audit logs, by default - level is "" - means
disabled. More details https://docs.mirantis.com/mke/3.7/ops/administer-cluster/mke-audit-logging/logging-levels.html
All logs are written to ucp-controller container log. Which is rotated
currently as follows - 3 log files at 1Gb each.

Related-Prod: https://mirantis.jira.com/browse/PRODX-44797
Change-Id: Ib73b30cf874ae119aef8842ea797de42e50b9a40
4 files changed