Runners are removed from manager when alloacted

This removes an existing unlocked shared access to runner.running.
This also sets us up for better management of the runners.

main.go

@@ -40,7 +40,7 @@ func main() {
 		return
 	}
 
-	getRunnerCh, registerCh, err := runnermanager.StartRunnerManager(configData.Config.Runners, db)
+	runnerManagerChans, err := runnermanager.StartRunnerManager(configData.Config.Runners, db)
 	if err != nil {
 		log.Errorf("Could not start runner: %v", err)
 		return
@@ -56,7 +56,6 @@ func main() {
 		configData.Config.Port,
 		configData.Config.PipelineConf,
 		db,
-		registerCh,
-		getRunnerCh,
+		runnerManagerChans,
 	))
 }