LogDog: Use luci_config/server packages for config

logdog/server/cmd/logdog_collector/main.go

 // Copyright 2016 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package main
 
 import (
         "fmt"
         "time"
 
@@ skipping 45 matching lines @@
                 distribution.DefaultBucketer)
 )
 
 // application is the Collector application state.
 type application struct {
         service.Service
 }
 
 // run is the main execution function.
 func (a *application) runCollector(c context.Context) error {
-        cfg := a.Config()
+        cfg := a.ServiceConfig()
         ccfg := cfg.GetCollector()
         if ccfg == nil {
                 return errors.New("no collector configuration")
         }
 
         pscfg := cfg.GetTransport().GetPubsub()
         if pscfg == nil {
                 return errors.New("missing Pub/Sub configuration")
         }
 
@@ skipping 144 matching lines @@
 
 // Entry point.
 func main() {
         a := application{
                 Service: service.Service{
                         Name: "collector",
                 },
         }
         a.Run(context.Background(), a.runCollector)
 }