Issue #2379943 by djdevin: Test fieldable result entity.
Issue #2381531: fixed update hook not working when truefalsewas not enabled.
Let Generator support base result entity.
Use generator on submit event of result entity form.
Move 'quiz_begin' invoking to generator.
Fix broken test cases.
Merge pull request #18 from atdrupal/test-fieldable-result

Test fieldable result entity