"Get the mysql container id when galera is enabled" play is error-prone

Issue

• openstack overcloud backup command fails. The following error is thrown:

  fatal: [controller02]: FAILED! => {"attempts": 300, "changed": true, "cmd": "set -o pipefail\npodman exec 8862d8d227b8\n1c9d9dd69dd3 bash -c \"mysql -p -u root \\\n-pPASSWORD --execute 'SET GLOBAL wsrep_desync = ON'\"\n", "delta": "0:00:00.145099", "end": "TS", "msg": "non-zero return code", "rc": 127, "start": "TS0", "stderr": "Error: must provide a non-empty command to start an exec session: invalid argument\n/bin/sh: line 2: 1c9d9dd69dd3: command not found", "stderr_lines": ["Error: must provide a non-empty command to start an exec session: invalid argument", "/bin/sh: line 2: 1c9d9dd69dd3: command not found"], "stdout": "", "stdout_lines": []}