pep8 test continuously fails on the gate

[Ken'ichi Ohmichi]

pep8 test of Tempest is falling now like:

http://logs.openstack.org/05/192505/4/gate/gate-tempest-pep8/0456618/console.html

2015-06-23 20:06:40.350 | --- /tmp/tempest.RIufmi/tempest.conf.sample 2015-06-23 20:06:40.312082067 +0000
2015-06-23 20:06:40.351 | +++ etc/tempest.conf.sample 2015-06-23 20:05:10.664624834 +0000
2015-06-23 20:06:40.351 | @@ -39,8 +39,8 @@
2015-06-23 20:06:40.351 | # Deprecated group/name - [DEFAULT]/logdir
2015-06-23 20:06:40.351 | #log_dir = <None>
2015-06-23 20:06:40.351 |
2015-06-23 20:06:40.351 | -# Use syslog for logging. Existing syslog format is DEPRECATED and
2015-06-23 20:06:40.351 | -# will be changed later to honor RFC5424. (boolean value)
2015-06-23 20:06:40.351 | +# Use syslog for logging. Existing syslog format is DEPRECATED during
2015-06-23 20:06:40.351 | +# I, and changed in J to honor RFC5424. (boolean value)
2015-06-23 20:06:40.351 | #use_syslog = false