qa/cephfs: pass confirmation flag to fs fail in tear down code

Since "ceph fs fail" command now requires the confirmation flag when
Ceph cluster has either health warning MDS_TRIM or MDS_CACHE_OVERSIZE,
update tear down in QA code. During the teardown, the CephFS should be
failed, regardless of whether or not Ceph cluster has health warnings,
since it is teardown.

Signed-off-by: Rishabh Dave <ridave@redhat.com>

Author: rishabh-d-dave

qa/tasks/cephfs/filesystem.py

@@ -605,7 +605,12 @@ def reset(self):
         self.run_ceph_cmd("fs", "reset", str(self.name), '--yes-i-really-mean-it')
 
     def fail(self):
-        self.run_ceph_cmd("fs", "fail", str(self.name))
+        cmd = ["fs", "fail", str(self.name)]
+        try:
+            self.run_ceph_cmd(cmd)
+        except CommandFailedError:
+            cmd.append("--yes-i-really-mean-it")
+            self.run_ceph_cmd(cmd)
 
     def set_flag(self, var, *args):
         a = map(lambda x: str(x).lower(), args)