Keystone component fails when enabling use_syslog_rfc_format in keystone.conf

Issue

• Keystone will fail to start when enabling syslog format for logging in /etc/keystone/keystone.conf

• The following error message will be thrown in /var/log/keystone/keystone.log

Traceback (most recent call last):
  File "/usr/bin/keystone-all", line 107, in <module>
    config.setup_logging()
  File "/usr/lib/python2.6/site-packages/keystone/config.py", line 56, in setup_logging
    log.setup('keystone')
  File "/usr/lib/python2.6/site-packages/keystone/openstack/common/log.py", line 461, in setup
    _setup_logging_from_conf(product_name, version)
  File "/usr/lib/python2.6/site-packages/keystone/openstack/common/log.py", line 517, in _setup_logging_from_conf
    facility=facility)
  File "/usr/lib/python2.6/site-packages/keystone/openstack/common/log.py", line 498, in __init__
    super(RFCSysLogHandler, self).__init__(*args, **kwargs)
TypeError: super() argument 1 must be type, not classobj

• The following parameter are set in /etc/keystone/keystone.conf

use_syslog=true
use_syslog_rfc_format=true
syslog_log_facility=LOG_USER