712cfcc71b
When a tripleo major upgrade or FFU causes an update or mariadb to a new major version (e.g. 10.1 -> 10.3), some internal DB tables must be upgraded (myisam tables), and sometimes the existing user tables may be migrated to new mariadb defaults. Move the db-specific upgrade steps into a dedicated script and make sure that it is called at the right time while upgrading the undercloud and/or the overcloud. Closes-Bug: #1913438 Change-Id: I92353622994b28c895d95bdcbe348a73b6c6bb99