Use /bin/bash as executable in a task of the mariadb recovery play
Use /bin/bash as executable in a task of the mariadb recovery play

Change-Id: I5e5aaab4fd1ef39de1b1e6fcf5b87ba8b41ba7eb
Closes-bug: 1729603

dardelean/kolla-ansible,dardelean/kolla-ansible,dardelean/kolla-ansible