qa/tasks/rbd_fio: unbreak after the conversion from StringIO

Fix a bad typo in commit db7ae8eff6 ("qa/tasks/rbd_fio: get rid of
StringIO for py3").

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Ilya Dryomov 2020-04-08 12:24:51 +02:00
parent e9f9e74f93
commit c3f4f1d660