This patchset adds a support for Swift Global Cluster feature as
described at:
https://docs.openstack.org/swift/latest/overview_global_cluster.html
It allows specifying affinity settings as parrt of the deployment.
Moreover, the master - slave relation is introduced for the purpose of
rings distribution across proxy nodes participating in the Swift Global
Cluster.
Change-Id: I406445493e2226aa5ae40a09c9053ac8633a46e9
Closes-Bug: 1815879
Depends-On: I11b6c7802e5bfbd61b06e4d11c65804a165781b6
44df5db97d