Ceph » CephFS

See a number of job failures in nautilus kcephfs suite due to incomplete py2 to py3 qa/tasks transition in nautilus.

Introduced by incomplete backport commit, https://github.com/ceph/ceph/pull/34171/commits/3dad1ac5f2db97cc3445bdf14a80dbb3e11f7d21

http://pulpito.ceph.com/yuriw-2020-06-08_17:04:08-kcephfs-wip-yuri5-testing-2020-06-08-1602-nautilus-distro-basic-smithi/

e.g.,
http://pulpito.ceph.com/yuriw-2020-06-08_17:04:08-kcephfs-wip-yuri5-testing-2020-06-08-1602-nautilus-distro-basic-smithi/5129683/
http://pulpito.ceph.com/yuriw-2020-06-08_17:04:08-kcephfs-wip-yuri5-testing-2020-06-08-1602-nautilus-distro-basic-smithi/5129685/

2020-06-09T02:02:57.789 INFO:tasks.cephfs_test_runner:    debug_dir = self._find_debug_dir()
2020-06-09T02:02:57.789 INFO:tasks.cephfs_test_runner:  File "/home/teuthworker/src/git.ceph.com_ceph-c_wip-yuri5-testing-2020-06-08-1602-nautilus/qa/tasks/cephfs/kernel_mount.py", line 215, in _find_debug_dir
2020-06-09T02:02:57.789 INFO:tasks.cephfs_test_runner:    ], stdout=StringIO(), timeout=(5*60))
2020-06-09T02:02:57.789 INFO:tasks.cephfs_test_runner:NameError: global name 'StringIO' is not defined