qa/tasks/ceph_manager.py: Increase timeout

qa/tasks/ceph_manager.py: Increase timeout

In test_pool_min_size():

1. Provided buffer time before we check
for recovery in ceph_manager.wait_for_recovery()

2. Increased timeout in ceph_manager.wait_for_clean()

3. Increased sleep time for
ceph_manager.all_active_or_peered()

Fixes:
https://tracker.ceph.com/issues/49777
https://tracker.ceph.com/issues/54511
https://tracker.ceph.com/issues/51904

Signed-off-by: Kamoltat <ksirivad@redhat.com>
(cherry picked from commit ed73288102f4aa67da3485c70b2409b9eca1873b)