suites/rados/cephadm: adding OSD_DOWN to the log-ignorelist

Some of the tests failed after OSD_DOWN warning appear in the log.
those OSD_DOWN happened during the tests and osd remove and destroy.

Fixes: https://tracker.ceph.com/issues/64865
Signed-off-by: Nitzan Mordechai <[email protected]>

Author: NitzanMordhai

qa/suites/orch/cephadm/osds/1-start.yaml

@@ -20,6 +20,8 @@ openstack:
     size: 10 # GB
 overrides:
   ceph:
+    log-ignorelist:
+      - OSD_DOWN
     conf:
       osd:
         osd shutdown pgref assert: true

qa/suites/orch/cephadm/smoke-singlehost/1-start.yaml

@@ -22,6 +22,8 @@ openstack:
     size: 10 # GB
 overrides:
   ceph:
+    log-ignorelist:
+      - OSD_DOWN
     conf:
       osd:
         osd shutdown pgref assert: true