Use portforwarding for qemu with user network

Only the SSH and the Docker port (2376) are available
with the slirp network, everything else needs tunneling.

pkg/minikube/driver/driver.go

@@ -183,6 +183,9 @@ func AllowsPreload(driverName string) bool {
 
 // NeedsPortForward returns true if driver is unable provide direct IP connectivity
 func NeedsPortForward(name string) bool {
+	if name == QEMU {
+		return true
+	}
 	if !IsKIC(name) {
 		return false
 	}