installer: change default nic for virtualbox due to performance issue
See:
@@ -88,6 +88,7 @@ func DefaultDriverOpts(driverName string) map[string]interface{} {
switch driverName {
case "virtualbox":
opts["virtualbox-memory"] = 2048
+ opts["virtualbox-nat-nictype"] = "Am79C973"
}
return opts
}
