qa/tasks/cephfs/mount.py: run_shell to use StringIO as default

Fixes: https://tracker.ceph.com/issues/45299
Signed-off-by: Xiubo Li <xiubli@redhat.com>

diff --git a/qa/tasks/cephfs/mount.py b/qa/tasks/cephfs/mount.py
index 91146695af08a7f8ced3880f8bc3d2e6549d2fb1..1ca99b0477b96f20a22fd1e231b200af38cff6ba 100644 (file)
--- a/qa/tasks/cephfs/mount.py
+++ b/qa/tasks/cephfs/mount.py
@@ -593,7 +593,7 @@ class CephFSMount(object):
             cwd = self.mountpoint
 
         return self.client_remote.run(args=args, stdin=stdin, wait=wait,
-                                      stdout=BytesIO(), stderr=BytesIO(),
+                                      stdout=StringIO(), stderr=StringIO(),
                                       cwd=cwd, check_status=check_status)
 
     def run_as_user(self, args, user, wait=True, stdin=None,