enable replication lag module

Signed-off-by: Tim Vaillancourt <tim@timvaillancourt.com>

go/vt/throttler/throttler_test.go

@@ -406,7 +406,7 @@ func TestThreadFinished_SecondCallPanics(t *testing.T) {
 
 func TestThrottlerMaxLag(t *testing.T) {
 	fc := &fakeClock{}
-	throttler, _ := newThrottlerWithClock("test", "queries", 1, 1, ReplicationLagModuleDisabled, fc.now)
+	throttler, _ := newThrottlerWithClock("test", "queries", 1, 1, 10, fc.now)
 	defer throttler.Close()
 
 	ctx, cancel := context.WithCancel(context.Background())