Update oslo.rootwrap to 5.6.0
Update oslo.rootwrap to 5.6.0

Change-Id: I5318b162cd79f17622dc2a0649b221a5fb57d921
Depends-on: I26ff58c4d146cfc263a0366769a40394c43c46c8

openstack/rpm-packaging,openstack/rpm-packaging