Update oslo.utils to 3.26.0
Update oslo.utils to 3.26.0

Change-Id: I743d19413a96d3ffdd867a6c5210c6163ef21f1b
Depends-on: I0d64ec8410af43d934dfe06a9f3f6735b23f49ad

openstack/rpm-packaging,openstack/rpm-packaging