The "download" suffix is redundant and reflects how `repo` used to be used in the download plugin -- as kind of a pseudo download bolted onto the side. Since we've reworked the plugin, we can rename this constant to better reflect its usage. We have to duplicate it here since the download-commands plugin is using this. Once that migrates, we can delete the old name. Change-Id: I948c7f2f427dec64c2617f834a5f7b35e7179543