No oslo.middleware releasenotes in newton
No oslo.middleware releasenotes in newton

The releasenotes implementation didn't make it into oslo.middleware
until ocata, so add it to the exclusion pattern for stable/newton.

Change-Id: I0c72ce8a7b2ad84292ff1b0622cbfc7eccf8ee31

openstack-infra/project-config,openstack-infra/project-config