Support multiple container endpoints

[nokjuh]

Currently the Traefik Service Fabric plugin only routes traffic to one container endpoint, the first one it happens to find (https://github.com/dariopb/serviceFabricDiscoveryService/blob/e4b897a1a9f5c6d2e0e8c5980ba7bb3284c9daa0/pkg/discovery/discoveryworker.go#L284).

It should allow configuring routing to different endpoints with different rules. E.g. if path is /webclient, route to container endpoint "web", if path is /mobileclient, route to container endpoint "mobile".