Fix import path

The utils package was moved to "internal" in commit
af306d149e76b100e08972cda364647bd7bcfe1e

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

integration/container/mounts_linux_test.go

@@ -13,7 +13,7 @@ import (
 	"github.com/docker/docker/api/types/network"
 	"github.com/docker/docker/client"
 	"github.com/docker/docker/integration-cli/daemon"
-	"github.com/docker/docker/integration/util/request"
+	"github.com/docker/docker/integration/internal/request"
 	"github.com/docker/docker/pkg/stdcopy"
 	"github.com/docker/docker/pkg/system"
 	"github.com/gotestyourself/gotestyourself/fs"