capture text logged in integration tests to a file

[Wu Hong Guang]

 the unittest2 runner replaces sys.stdout/sys.stderr before the testing starts, and the StreamHandler is still writing to the original sys.stdout.

To assign the 'current' sys.stdout to the handler

import sys
import unittest
import logging

logger = logging.getLogger()
logger.level = logging.DEBUG

class TestCase(unittest.TestCase):
    def Setup(self):
        //stream_handler = logging.StreamHandler(sys.stdout)
        self.handler = logging.StreamHandler(sys.stdout)
        logger.addHandler(stream_handler)

  def Teardown()
        logger.removeHandler(stream_handler)

[Timur Sufiev (tsufiev-x)]

Wu Hong, could you please elaborate the purpose of this change? For example here http://logs.openstack.org/35/168935/15/check/gate-horizon-dsvm-integration/5bd8a67/logs/apache/horizon_error.txt.gz I can see all Apache logs. What's wrong with them?