private/testplanet: add STORJ_TEST_DISABLEQUIC environment flag

Currently Windows seems to dislike creating udp servers in a very
fast fashion. Add an environment flag that allows to disable quic,
which is the main culprit.

Individual tests can still override that setting.

Change-Id: I3b30c4aa7fcb148b2894335394fdfae6eaa372bb

private/testplanet/satellite.go

@@ -464,6 +464,10 @@ func (planet *Planet) newSatellite(ctx context.Context, prefix string, index int
 	config.Console.StaticDir = filepath.Join(developmentRoot, "web/satellite")
 	config.Payments.Storjscan.DisableLoop = true
 
+	if os.Getenv("STORJ_TEST_DISABLEQUIC") != "" {
+		config.Server.DisableQUIC = true
+	}
+
 	if planet.config.Reconfigure.Satellite != nil {
 		planet.config.Reconfigure.Satellite(log, index, &config)
 	}

private/testplanet/storagenode.go

@@ -217,6 +217,10 @@ func (planet *Planet) newStorageNode(ctx context.Context, prefix string, index,
 		},
 	}
 
+	if os.Getenv("STORJ_TEST_DISABLEQUIC") != "" {
+		config.Server.DisableQUIC = true
+	}
+
 	// enable the lazy filewalker
 	config.Pieces.EnableLazyFilewalker = true