Remove test_log_types

It didn't test any fancylogger-specific functionality.  Instead, it only
called methods derived from the logging class, and tried to mix up
fancylogger's and logging's internals.

The result was that this test failed always on Python 2.6.  For months.
Just get rid of the useless damn thing.
Don't close files that belong to fancylogger.

This made the tests crash with the following backtrace on Python 2.6:

FAILED (failures=1)
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/usr/lib64/python2.6/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/usr/lib64/python2.6/logging/__init__.py", line 1516, in shutdown
    h.flush()
  File "/usr/lib64/python2.6/logging/__init__.py", line 762, in flush
    self.stream.flush()
ValueError: I/O operation on closed file
Error in sys.exitfunc:
Traceback (most recent call last):
  File "/usr/lib64/python2.6/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/usr/lib64/python2.6/logging/__init__.py", line 1516, in shutdown
    h.flush()
  File "/usr/lib64/python2.6/logging/__init__.py", line 762, in flush
    self.stream.flush()
ValueError: I/O operation on closed file
Merge pull request #70 from piojo/fix-jenkins

Fix Jenkins tests.