When the remote plugin was developed it made the assumption that the
`enabled_share_backends` included the remote backends. This assumption
is wrong, and it should only contain the locally defined drivers; i.e.
ones that have a [driver] section in the manila.conf file. The cephfsnfs
driver doesn't have a local configuration as the share-server is runs on
the manila-ganesha unit and so shouldn't be local.
This patch splits the config in local/remote and then uses the local and
remote config in the correct places.
Closes-Bug: #2012457
Change-Id: I436452208aaeaf08d1655da4fccbd7a89549b404
d0ad23950f