Veck140808

This patch do all video unit test well with karma-mocha.
I create bluetooth.config to experiment bluetooth unit test separated with video unit test.

Because I want to load all setup.js in each apps/*/test/unit directory, so that we could load mocks_helper.js in karma. I created setup_loader.js for detecting file existence and loading work for them. "bluetooth_loader.js" is just experimental with bluetooth test. This is now in progress.