title: Unable to print logging output using xmlrunner for unittest
body: <p>I am trying to use xmlrunner to generate a xml of my test result with unittest. I would like the report to include my logging output.
  But it looks like it doesn't work.</p>
  
  <p>For example, in this code, the logging output is not showing in the xml report.</p>
  
  <pre><code>import unittest
  import logging
  import xmlrunner
  import sys
  
  
  class Test(unittest.TestCase):
  
      @classmethod
      def setUpClass(cls):
          logging.getLogger().debug("setUpClass")
  
      def test_step_001(self):
          logging.getLogger().debug("test_step_001")
  
      @classmethod
      def tearDownClass(cls):
          logging.getLogger().debug("tearDownClass")
  
  
  if __name__ == '__main__':
      logging.basicConfig(level=logging.DEBUG, format="%(asctime)s %(levelname)s %(message)s", stream=sys.stdout)
      unittest.main(testRunner=xmlrunner.XMLTestRunner(output='test-reports'))
  </code></pre>