Volume constraint is missing in mariadb service in etherpad example, so added that so that it mariadb container does not fail in environments where creating container in /var/lib/mysql is not allowed for non-root process.
With the recent changes in the output format as List, updated tests as well so they validate on the new format of output.
Shell scripts to test k8s and os conversion which can be ran by following command in root dir `./script/test/cmd/tests.sh`
