Merge lp:~sylvain-pineau/checkbox/fix-1258477 into lp:checkbox

[Sylvain Pineau]

Please read the commit message and the linked bug for context.

[Zygmunt Krynicki (zyga)]

Excellent find Sylvain. How did you figure out which moudle was causing this?

review: Approve

[Sylvain Pineau (sylvain-pineau)]

Using a dichotomic search, after working a unittests using setup.py -s, I realized that just a small subset of the whole testsuite was causing this error.
And you were right It was all about finalization, not logging but threads.

=== modified file 'plainbox/plainbox/impl/commands/test_run.py'
--- plainbox/plainbox/impl/commands/test_run.py	2013-12-09 12:36:09 +0000
+++ plainbox/plainbox/impl/commands/test_run.py	2013-12-09 15:48:35 +0000
@@ -39,11 +39,12 @@
 from plainbox.impl.exporter.text import TextSessionStateExporter
 from plainbox.impl.exporter.xml import XMLSessionStateExporter
 from plainbox.testing_utils.io import TestIO
-from plainbox.vendor.mock import patch
+from plainbox.vendor.mock import patch, Mock
 
 
 class TestRun(TestCase):
 
+    @patch.dict('sys.modules', {'concurrent': Mock()})
     def setUp(self):
         # session data are kept in XDG_CACHE_HOME/plainbox/.session
         # To avoid resuming a real session, we have to select a temporary