I just created a new story for the Build team to change the mirror download and build scripts to enable us to create and manage per-company, shared import mirrors.  This should help insulate most developers from changes in upstream packages.  We recommend building one shared mirror per company per geography.  This is a short term band-aid while we figure out our long term build strategy.

The story is https://storyboard.openstack.org/#!/story/2003288.

Build team, please review and start work on this.  Thanks!

         brucej