FR: Need a better way of finding images for devices

Currently when constructing new jobs on new hardware the solution is to grep though various job definitions to find a suitable image for the deploy and boot steps for which to run your test. This is exacerbated by the fact that health check jobs typically have their definition hidden.

What would be really useful is a summary of images known to work for each device. This could be built dynamically as more successful jobs are run on a device. Bonus points for making this information available via the XML-RPC interface ;-)