test failures with python 3.4

[Martin Pitt]

With python3.4 as the default, unattended-upgrades has several test failures:

  http://people.canonical.com/~pitti/tmp/autopkgtest-py34/fail/py34-unattended-upgrades/results/

 ======================================================================
ERROR: test_mail_quoted_printable (__main__.SendmailAndMailxTestCase)
Regression test for debian bug #700178
----------------------------------------------------------------------
Traceback (most recent call last):
  File "./test_mail.py", line 151, in test_mail_quoted_printable
    send_summary_mail(*self._return_mock_data())
  File "/tmp/adt-run.KYI3Ji/dsc0-build/unattended-upgrades-0.81/test/unattended_upgrade.py", line 740, in send_summary_mail
    ret = _send_mail_using_sendmail(to_email, subject, body)
  File "/tmp/adt-run.KYI3Ji/dsc0-build/unattended-upgrades-0.81/test/unattended_upgrade.py", line 674, in _send_mail_using_sendmail
    msg.set_payload(body)
  File "/usr/lib/python3.4/email/message.py", line 311, in set_payload
    " payload") from None
TypeError: charset argument must be specified when non-ASCII characters are used in the payload

[Launchpad Janitor (janitor)]

This bug was fixed in the package unattended-upgrades - 0.82

---------------
unattended-upgrades (0.82) unstable; urgency=low

  [ Brian Murray ]
  * unattended-upgrade: specify charset when setting email payload for
    python3.4 (LP: #1272381)
  * change logging.warn calls to logging.warning
  * test/test_email.py: use with to open email in test_mail_quoted_printable

 -- Michael Vogt <email address hidden> Thu, 06 Feb 2014 08:54:25 +0100