Disabled the check for python code in order to reduce the runtime of 'pylearn2/scripts/papers/dropout/tests/test_dropout.py'

As suggested by nouiz , I disabled the check for python code in order to reduce the runtime to 3 hours in DEBUG_MODE.
That's odd, I just tried to run this test while in default mode and it caused an error like you wrote. Is it possible the buildbot doesn't run this test in default mode? Another possibility is that one of the scripts run by the buildbot enables DEBUG_MODE but doesn't disable it after it has finished. I'll run the buildbot and see what happens.