Remove an unneeded temporary method for logging exception stack traces in the test suite in favor of using the logging module's ability to do so.
Remove an unneeded temporary method for logging exception stack traces in the
test suite in favor of using the logging module's ability to do so.

* subversion/tests/cmdline/svntest/main.py
  (_log_exception): Remove.
  (TestRunner.run): Use the exc_info parameter of logger.warn() to print the
    exception.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion