Updated openstack/openstack
Project: openstack/oslo-incubator  463e69169289c8e9f01cf3354aac61fa82b3dcad

remove oslo log from middleware

as per graduation process, remove oslo log from middleware module

Change-Id: I0bda34695d65682dd29ff5f21fda53178d8a0e07
Implements: blueprint graduate-oslo-middleware