Update oslo.service to 1.27.0
Update oslo.service to 1.27.0

Depends-on: Iaf5fcd5a4a9c1c55a81cee0a960aab3a7564191c
Change-Id: I315fcae6877d8e47234726c6b556b7f2a08c0593

openstack/rpm-packaging,openstack/rpm-packaging