satellite/metabase/rangedloop: disable ranged loop for tests

Currently each testplanet test is running ranged loop no matter if
it's used or not. This is small change with some benefits like:
* saves some cpu cycles
* less log entries
* ranged loop won't interfere with other systems

Change have no big impact on tests execration but I believe it's nice to
have.

Change-Id: I731846bf625cac47ed4f3ca3bc1d1a4659bdcce8

satellite/metabase/rangedloop/service.go

@@ -30,7 +30,7 @@ type Config struct {
 	Parallelism        int           `help:"how many chunks of segments to process in parallel" default:"2"`
 	BatchSize          int           `help:"how many items to query in a batch" default:"2500"`
 	AsOfSystemInterval time.Duration `help:"as of system interval" releaseDefault:"-5m" devDefault:"-1us" testDefault:"-1us"`
-	Interval           time.Duration `help:"how often to run the loop" releaseDefault:"2h" devDefault:"10s" testDefault:"10s"`
+	Interval           time.Duration `help:"how often to run the loop" releaseDefault:"2h" devDefault:"10s" testDefault:"0"`
 
 	SuspiciousProcessedRatio float64 `help:"ratio where to consider processed count as supicious" default:"0.03"`
 }
@@ -93,6 +93,10 @@ func (service *Service) Close() error {
 func (service *Service) Run(ctx context.Context) (err error) {
 	defer mon.Task()(&ctx)(&err)
 
+	if service.config.Interval == 0 {
+		return nil
+	}
+
 	service.log.Info("ranged loop initialized")
 
 	return service.Loop.Run(ctx, func(ctx context.Context) error {

satellite/repair/checker/observer_test.go

@@ -590,7 +590,12 @@ func TestObserver_PlacementCheck(t *testing.T) {
 	testplanet.Run(t, testplanet.Config{
 		SatelliteCount: 1, StorageNodeCount: 4, UplinkCount: 1,
 		Reconfigure: testplanet.Reconfigure{
-			Satellite: testplanet.ReconfigureRS(1, 2, 4, 4),
+			Satellite: testplanet.Combine(
+				testplanet.ReconfigureRS(1, 2, 4, 4),
+				func(log *zap.Logger, index int, config *satellite.Config) {
+					config.RangedLoop.Interval = 10 * time.Second
+				},
+			),
 		},
 	}, func(t *testing.T, ctx *testcontext.Context, planet *testplanet.Planet) {
 		planet.Satellites[0].RangedLoop.RangedLoop.Service.Loop.Pause()