Make the new check PGs working with /bin/sh
Make the new check PGs working with /bin/sh

The new test in the checks PGs are no longer working on distributions
where /bin/sh isn't linked to /bin/bash.

Fix: #1619
Signed-off-by: Guillaume Abrioux <30a9df5a0293a6108675377fa1673f7aa713f915@redhat.com>

ceph/ansible-ceph-common