This PS removes mariadb-verify-server sidecar container from
mariadb-backup cronjob in order to make backup process more resilient.
Change-Id: I2517c2de435ead34397ca0483610f511c8035bdf
This PS adds mariadb-cluster chart based on mariadb-operator. Also for
some backward compartibility this PS adds mariadb-backup chart and
prometheus-mysql-exporter chart as a separate ones.
Change-Id: I3f652375cce2e3b45e095e08d2e6f4ae73b8d8f0