tests: reduce the amount of time we wait
tests: reduce the amount of time we wait

This sleep 120 looks a bit long, let's reduce this to 30sec and see if
things go faster.

Signed-off-by: Guillaume Abrioux <30a9df5a0293a6108675377fa1673f7aa713f915@redhat.com>
(cherry picked from commit 081600842ff3758910109d9f636b54cb12a85ed9)

fgal/ceph-ansible,fgal/ceph-ansible