An exception in setUpClass() should not terminate autonose

[lieryan]

Autonose terminates with the following traceback when setUpClass() raises an error:

Traceback (most recent call last):
  File "/home/lieryan/.cache/0install.net/implementations/sha256=69730523263f37581d813bf443f6ca9d528055968d95124d1558baebd0a4f5ec/paragram/process/base_process.py", line 209, in _run
    self._target(self, *self._args, **self._kwargs)
  File "/home/lieryan/Projects/autonose/autonose/runner.py", line 194, in run_tests
    nose.run(argv=args, addplugins=[watcher_plugin])
  File "/home/lieryan/.cache/0install.net/implementations/sha256new_QI4EUIDXPFPFZMN4IGFFA3W5CN6WQ3G3C4V7VGBN3MGQD5BKJJUQ/lib/nose/core.py", line 291, in run
    return TestProgram(*arg, **kw).success
  File "/home/lieryan/.cache/0install.net/implementations/sha256new_QI4EUIDXPFPFZMN4IGFFA3W5CN6WQ3G3C4V7VGBN3MGQD5BKJJUQ/lib/nose/core.py", line 118, in __init__
    **extra_args)
  File "/usr/lib/python2.7/unittest/main.py", line 95, in __init__
    self.runTests()
  File "/home/lieryan/.cache/0install.net/implementations/sha256new_QI4EUIDXPFPFZMN4IGFFA3W5CN6WQ3G3C4V7VGBN3MGQD5BKJJUQ/lib/nose/core.py", line 197, in runTests
    result = self.testRunner.run(self.test)
  File "/home/lieryan/.cache/0install.net/implementations/sha256new_QI4EUIDXPFPFZMN4IGFFA3W5CN6WQ3G3C4V7VGBN3MGQD5BKJJUQ/lib/nose/core.py", line 61, in run
    test(result)
  File "/home/lieryan/.cache/0install.net/implementations/sha256new_QI4EUIDXPFPFZMN4IGFFA3W5CN6WQ3G3C4V7VGBN3MGQD5BKJJUQ/lib/nose/suite.py", line 176, in __call__
    return self.run(*arg, **kw)
  File "/home/lieryan/.cache/0install.net/implementations/sha256new_QI4EUIDXPFPFZMN4IGFFA3W5CN6WQ3G3C4V7VGBN3MGQD5BKJJUQ/lib/nose/suite.py", line 223, in run
    test(orig)
  File "/home/lieryan/.cache/0install.net/implementations/sha256new_QI4EUIDXPFPFZMN4IGFFA3W5CN6WQ3G3C4V7VGBN3MGQD5BKJJUQ/lib/nose/suite.py", line 176, in __call__
    return self.run(*arg, **kw)
  File "/home/lieryan/.cache/0install.net/implementations/sha256new_QI4EUIDXPFPFZMN4IGFFA3W5CN6WQ3G3C4V7VGBN3MGQD5BKJJUQ/lib/nose/suite.py", line 223, in run
    test(orig)
  File "/home/lieryan/.cache/0install.net/implementations/sha256new_QI4EUIDXPFPFZMN4IGFFA3W5CN6WQ3G3C4V7VGBN3MGQD5BKJJUQ/lib/nose/suite.py", line 176, in __call__
    return self.run(*arg, **kw)
  File "/home/lieryan/.cache/0install.net/implementations/sha256new_QI4EUIDXPFPFZMN4IGFFA3W5CN6WQ3G3C4V7VGBN3MGQD5BKJJUQ/lib/nose/suite.py", line 213, in run
    result.addError(self, self._exc_info())
  File "/home/lieryan/.cache/0install.net/implementations/sha256new_QI4EUIDXPFPFZMN4IGFFA3W5CN6WQ3G3C4V7VGBN3MGQD5BKJJUQ/lib/nose/proxy.py", line 124, in addError
    plugin_handled = plugins.handleError(self.test, err)
  File "/home/lieryan/.cache/0install.net/implementations/sha256new_QI4EUIDXPFPFZMN4IGFFA3W5CN6WQ3G3C4V7VGBN3MGQD5BKJJUQ/lib/nose/plugins/manager.py", line 99, in __call__
    return self.call(*arg, **kw)
  File "/home/lieryan/.cache/0install.net/implementations/sha256new_QI4EUIDXPFPFZMN4IGFFA3W5CN6WQ3G3C4V7VGBN3MGQD5BKJJUQ/lib/nose/plugins/manager.py", line 167, in simple
    result = meth(*arg, **kw)
  File "/home/lieryan/Projects/autonose/autonose/watcher.py", line 136, in handleError
    err = test.plugins.formatError(test, err) or err
AttributeError: 'ContextSuite' object has no attribute 'plugins'