Create a tool to find out the average test coverage in Jenkins plug-ins

This idea popped up while chatting with Richard Lavoie. I was telling him about selenium tests for plug-ins, snakebite one thing leads to another, and then came the idea of measuring the coverage in plug-ins.

Basically, this tool would have to iterate over the 600+ plug-ins, and trigger a mvn test command. Then it would have to save the coverage information somewhere, and plot a graph, or generate some report about it.

Depending on the machine, probably this tool could spawn more than 1 thread for doing this. Even then, it would still take quite a while for processing all the plug-ins.