(ops) don't crash Manon on first MariaDB start
(ops) don't crash Manon on first MariaDB start

On first run, Manon application could fail if MariaDB takes too much time to start.
Workaround: on first run (database directory doesn't exist), wait 15s.

jonathanlermitage/manon,jonathanlermitage/manon,jonathanlermitage/manon