Comment 1 for bug 1621073

oslo_context provides a convenient way to create a context from environment [1].
neutron.auth has its own logic to extract environments and create a context [2].

neutron.auth needs to be updated to use the standard way from oslo.context.

[1] http://git.openstack.org/cgit/openstack/oslo.context/tree/oslo_context/context.py
[2] http://git.openstack.org/cgit/openstack/neutron/tree/neutron/auth.py#n27