prepend tear down steps like tearDownForComponent in the begining of tearDownSteps array

[tsing80]

Currently, component.destroy() is only run after #ember-testing DOM element is emptied. When the component which use third party library like jquery-ui or bootstrap javascript component do cleanup using willDestroyElement() hook, it cannot cleanup properly because the element is already removed from DOM. In additional , teardownStep should be run in reverse order as setupSteps in general. So this PR also fix the _resetViewRegistry() hook in TestModuleForComponent.

[tsing80]

@rwjblue ping

[rwjblue]

Thanks for the reminder! This looks good, but I'd love to have a test that ensures the ordering of teardown is what we expect. A good place to start is by adding a test similar to this one that shows the ordering of all the hooks. You would need to add a component that pushes a component-destroyed entry to the callbackOrder when it's destroy was called, then deepEqual the final array in afterTeardown to ensure it happens properly.

[tsing80]

@rwjblue I have added a test based on the one in component unit test

[rwjblue]

awesome, thank you!