Message of "Incomplete relations" is confusing (auto zone assignment)

[Peter Matulis]

The `juju status` command shows these lines:

swift-proxy/2* blocked idle 0/lxd/3 10.0.0.214 8080/tcp Not enough related storage nodes
swift-storage/3* waiting idle 1 10.0.0.246 Incomplete relations: proxy

This is the case even if the relation has already been added:

juju deploy swift-proxy --to lxd:0 --config swift-proxy.yaml
juju deploy swift-storage --to 1 --config swift-storage.yaml
juju add-relation swift-proxy:swift-storage swift-storage:swift-storage

Only once storage nodes are added to complete the replica requirement does the message go away:

juju add-unit --to 2 swift-storage
juju add-unit --to 3 swift-storage

swift-proxy/3* active idle 0/lxd/4 10.0.0.204 8080/tcp Unit is ready
swift-storage/6* active idle 1 10.0.0.246 Unit is ready

cat swift-proxy.yaml swift-storage.yaml

swift-proxy:
  zone-assignment: auto
  replicas: 3
swift-storage:
  block-device: vdc
  overwrite: "true"