Create mock for store and add unit tests for cron (#1146)

* pass remote on init as argument like store

* mock store

* TestCreateBuild

cmd/server/server.go

@@ -187,7 +187,7 @@ func run(c *cli.Context) error {
 	setupMetrics(&g, _store)
 
 	g.Go(func() error {
-		return cron.Start(c.Context, _store)
+		return cron.Start(c.Context, _store, _remote)
 	})
 
 	// start the server with tls enabled