Remove drush option <contrib-destination> from "prepare install" command
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/<my-profile> 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.