title: TypeError: not all arguments converted during string formatting error python
body: <p>I have customized tempest code for our REST API's, but when i run the scripts, using nosetests at the beginning it gives some weird type error as mentioned below, though test cases in the script passes</p>
  
  <pre><code>Traceback (most recent call last):
    File "/usr/lib64/python2.6/logging/__init__.py",line 776, in emit msg = self.format(record)
    File "/usr/lib64/python2.6/logging/__init__.py", line 654, in format return fmt.format(record)
    File "/home/rmcbuild/repository/rmc-test/tempest/openstack/common/log.py", line 516, in format return logging.Formatter.format(self, record)
    File "/usr/lib64/python2.6/logging/__init__.py", line 436, in format record.message = record.getMessage()
    File "/usr/lib64/python2.6/logging/__init__.py", line 306, in getMessage msg = msg % self.args
   TypeError: not all arguments converted during string formatting
  </code></pre>
  
  <p>has anyone come across this type of error, would appreciate if someone helps me out of it.</p>
  
  <p>Thanks,</p>