AttributeError: StringIO instance has no attribute 'fileno'

[Paul Larson]

In the new utah that was pushed out recently 0.12.5, I'm seeing some new failures with the static iso tests.
See http://10.98.0.1:8080/view/Saucy/view/Smoke%20Testing/job/saucy-server-amd64-smoke-iso-validation/46/console for details
namely:
ERROR: Traceback (most recent call last):
  File "/usr/lib/python2.7/unittest/case.py", line 327, in run
    testMethod()
  File "/usr/share/utah/isotest/iso_static_validation.py", line 458, in test_efi_secure_boot_signatures
    export_bzr_keys.get()
  File "/usr/lib/python2.7/dist-packages/utah/client/vcs.py", line 66, in get
    battery_measurements=self.battery_measurements)
  File "/usr/lib/python2.7/dist-packages/utah/client/common.py", line 164, in run_cmd
    rc, timedout, out, err = run(cmd, cwd, timeout, True)
  File "/usr/lib/python2.7/dist-packages/utah/process.py", line 213, in run
    os.dup2(stdout_w, sys.stdout.fileno())
AttributeError: StringIO instance has no attribute 'fileno'

...and:
ERROR: Traceback (most recent call last):
  File "/usr/lib/python2.7/unittest/case.py", line 327, in run
    testMethod()
  File "/usr/share/utah/isotest/iso_static_validation.py", line 463, in test_efi_secure_boot_signatures
    self.assertEqual(stderr, '')
  File "/usr/lib/python2.7/unittest/case.py", line 511, in assertEqual
    assertion_func(first, second, msg=msg)
  File "/usr/lib/python2.7/unittest/case.py", line 504, in _baseAssertEqual
    raise self.failureException(msg)
AssertionError: 'make: *** /tmp/tmpUxAIiR/keys: No such file or directory. Stop.\n' != ''