adding a bootstrap job. It should bring in the full dependencies of ROS ...

...not just the python tools now. This needs to be run before kicking off any release jobs.

@dirk-thomas This is a rough approximation of what needs to happen. I wasn't sure where this would best fit into the architecture. 

This or equivalent is needed to land: https://github.com/ros-infrastructure/buildfarm_deployment/pull/10
It defaults to aggregating all yaml files in the directory defined by upstream_config in reprepro-updater.ini  

usually a directory which looks like this: https://github.com/ros-infrastructure/reprepro-updater/tree/master/config you can select specific files if you want.