qa/cephfs: fix AssertionError: CommandFailedError not raised under py3

Signed-off-by: Xiubo Li <xiubli@redhat.com>

diff --git a/qa/tasks/cephfs/test_volume_client.py b/qa/tasks/cephfs/test_volume_client.py
index b0b1b2e0fd44ee0dc014e8f502969b6896a82f43..e02ba0ee76eb52f8025bba0237dfa412c463a568 100644 (file)
--- a/qa/tasks/cephfs/test_volume_client.py
+++ b/qa/tasks/cephfs/test_volume_client.py
@@ -606,8 +606,10 @@ vc.disconnect()
         # Read existing content of the volume.
         self.assertListEqual(guest_mount.ls(guest_mount.mountpoint), ["data.bin"])
         # Cannot write into read-only volume.
-        with self.assertRaises(CommandFailedError):
+        try:
             guest_mount.write_n_mb("rogue.bin", 1)
+        except CommandFailedError:
+            pass
 
     def test_get_authorized_ids(self):
         """