Comment 4 for bug 1399788

I think so(devstack issue).

In my devstack, ./lib/neutron(line 830) is

setup_colorized_logging $NEUTRON_CONF DEFAULT project_id

2014-11-25 08:22:07.563 | + setup_colorized_logging /etc/neutron/neutron.conf DEFAULT project_id
2014-11-25 08:22:07.563 | + local conf_file=/etc/neutron/neutron.conf
2014-11-25 08:22:07.563 | + local conf_section=DEFAULT
2014-11-25 08:22:07.563 | + local project_var=project_id
2014-11-25 08:22:07.563 | + local user_var=user_name
2014-11-25 08:22:07.563 | + iniset /etc/neutron/neutron.conf DEFAULT logging_context_format_string '%(asctime)s.%(msecs)03d %(color)s%(levelname)s %(name)s [^[[01;36m%(request_id)s ^[[00;36m%(user_name)s %(project_id)s%(color)s] ^[[01;35m%(instance)s%(color)s%(message)s^[[00m'

So, in my /etc/neutron/neutron.conf
logging_context_format_string = %(asctime)s.%(msecs)03d %(color)s%(levelname)s %(name)s [^[[01;36m%(request_id)s ^[[00;36m%(user_name)s %(project_id)s%(color)s] ^[[01;35m%(instance)s%(color)s%(message)s

and in screen-q-svc.2014-12-02-110757.log
2014-12-02 11:12:06.219 DEBUG neutron.service [-] logging_context_format_string = %(asctime)s.%(msecs)03 d %(color)s%(levelname)s %(name)s [%(request_id)s %(user_name)s %(project_id)s%(color)s] %(instance)s%(color)s%(message)s

So please check your devstack setup.
As this is a devstack/setup issue, I am setting the status of the bug as 'invalid'