test_can_unlock_pin_screen broken under py3

[Michał Sawicz]

Revision 1680¹ wrongly removed the py3 compatibility bit, resulting in a failure in tablet scenario:

Traceback (most recent call last):
  File "/home/michal/dev/canonical/unity8/repo/tests/autopilot/unity8/shell/tests/test_lock_screen.py", line 47, in test_can_unlock_pin_screen
    self._enter_prompt_passphrase("1234\n")
  File "/home/michal/dev/canonical/unity8/repo/tests/autopilot/unity8/shell/tests/test_lock_screen.py", line 138, in _enter_prompt_passphrase
    if not isinstance(passphrase, basestring):
NameError: name 'basestring' is not defined

¹ http://bazaar.launchpad.net/~unity-team/unity8/trunk/revision/1680#tests/autopilot/unity8/shell/tests/test_lock_screen.py

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: unity8 8.02+15.04.20150318-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
Uname: Linux 3.19.0-9-generic x86_64
ApportVersion: 2.16.2-0ubuntu3
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Mar 20 12:19:15 2015
SourcePackage: unity8
SystemImageInfo:
 current build number: 0
 device name:
 channel: daily
 last update: Unknown
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

This bug was fixed in the package unity8 - 8.02+15.04.20150409.1-0ubuntu1

---------------
unity8 (8.02+15.04.20150409.1-0ubuntu1) vivid; urgency=medium

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 -- CI Train Bot <email address hidden> Thu, 09 Apr 2015 14:01:11 +0000