test: check starting InnoDB without a volume
test: check starting InnoDB without a volume

Previous versions of MariaDB broke in certain scenarios
when using docker, aufs or other mounted drives with Mariadb `10.2.x`
and likely also some versions of `10.3.x`.

Fixes: https://github.com/jbergstroem/mariadb-alpine/issues/1

jbergstroem/mariadb-alpine