
If mariadb-clustercheck starts before mariadb, the directory may not
exist, and the command fails.
This is necessary for the refactored MariaDB restart in
I5a12670d07077d24047aaff57ce8d33ccf7156ff.
Change-Id: Ie1b36eb9a403611c2f86aa4c1d500d324e5291f3
(cherry picked from commit 9035251443
)