Update integration test to support windows

Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>

testutil/helpers_windows.go

@@ -0,0 +1,16 @@
+package testutil
+
+import "testing"
+
+// RequiresRoot does nothing on Windows
+func RequiresRoot(t testing.TB) {
+}
+
+// RequiresRootM is similar to RequiresRoot but intended to be called from *testing.M.
+func RequiresRootM() {
+}
+
+// Unmount unmounts a given mountPoint and sets t.Error if it fails
+// Does nothing on Windows
+func Unmount(t *testing.T, mountPoint string) {
+}