The start() function honors datadir defined in /etc/my.cnf.d/mariadb-server.cnf whereas setup() does not (static path /var/lib/mysql). This is a problem once you define a path in mariadb-server.cnf because the both functions point to different paths then.
- fixed
setup()function (honors/etc/my.cnf.d/mariadb-server.cnf) - made variables whitespace safe (set in quotes)