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
* Needed to add a swift_manager/manager.py file which uses the payload
software python modules to perform certain functions on behalf of the
charm. These were part of the main charm, which couldn't be retained
in the charm due to the charm changing to Py3.
* Changed to absolute imports using the charm root as the root for all
charm modules.
* The py2 target in tox.ini is used to test the swift_manager/manager.py
file only.
* The .testr.conf file has been migrated to .stestr.conf
Change-Id: If37a393aa6ed27651b04810aa0bbf69eda37d7b4
