Move coverage report generation to test methods
Move coverage report generation to test methods

We want to stop leaking the Mocha specific `this.test.fullTitle` in
suite.js and the first step is to stop relying it in the afterEach hook.

NiGhTTraX/react-test-buffet,NiGhTTraX/react-test-buffet,NiGhTTraX/react-test-buffet