Use factory file so JS used by studio_xblock_wrapper.html goes through RequireJS Optimizer

The code change is up on my sandbox (http://studio.cahrens.m.sandbox.edx.org/course/validation/validation/validation).

You can see there that the factory file is loaded instead of the individual model and view files.

@andy-armstrong and @polesye please review
Ah, thanks. I didn't  see it.