Replace or augment test class name with human-readable name

When testbot fails a test, it's natural to want to run the failing test on your own environment so you can flip on verbose mode, throw some debugging code in, whatever. However, it's virtually impossible to match up the failing tests with the actual thing you want in the interface; they're in a completely different order, and it's only by convention that the name of the test class is sometimes roughly similar to the thing you want to click in the interface.

I'd recommend we at least add the human-readable name as a column (the far left) and sort by it, so that it matches the testing interface. I guess the actual class names are useful for running tests from the command line, otherwise I'd drop them.