Set the boto config so GSUtil works with provisioned service accounts.

def _SetupBotoConfig(self):
    """Set the boto config so GSUtil works with provisioned service accounts."""
    project_id = self._GetNumericProjectId()
    try:
      boto_config.BotoConfig(project_id, debug=self.debug)
    except (IOError, OSError) as e:
      self.logger.warning(str(e))