Merged requested to merge feature/no-contrib-destination into 2.x
We should parametrize this option through drush's make/yml files.
This will avoid an error that occurs in some situations where the folder to specified in contrib-destination gets overwritten by a git clone.
e.g. : profiles/ gets overwritten by a git clone while it might have been parent folder of contrib modules previously downloaded.
This depends on the order a drush make/yml file has been written as far as I can understand the issue.