Update oslo.db to 4.26.0
Update oslo.db to 4.26.0

Change-Id: I0f9a962a25fa0a59ff225ed2803c15af38070714
Depends-on: Ifb533e9cfb9940e36ca6caa8f8d45a4dd9f7dc3b

openstack/rpm-packaging,openstack/rpm-packaging