MariaDB clustercheck script has not been maintained and it will not work
with MariaDB 11.4 (the next LTS version).
This is because clustercheck.sh uses ``mysql*`` commands but from
MariaDB 11.4, those commands are not supported.
The health check of MariaDB server containers will be done by new script
which comes with change [1].
Without MariaDB clustercheck, MariaDB server becomes only container image in
the family, so mariadb-base and mariadb-server dockerfiles are merged.
To avoid breaking changes, the name 'mariadb-server' is retained.
Follow-up to rename references in Kolla and K-A from 'mariadb-server' to
'mariadb' would be nice.
[1] https://review.opendev.org/c/openstack/kolla/+/962657
Change-Id: I01278f76ee82b018a854b5862f3caaa8c78a9a30
Signed-off-by: Seunghun Lee <seunghun@stackhpc.com>