Include ESLint default config files in app/addon blueprints

[Turbo87]

Instead of running the ember-cli-eslint blueprint on ember new we should instead just duplicate the empty ESLint config files so that e.g. they show up at https://github.com/ember-cli/ember-new-output and also work with the --skip-npm flag.

[kellyselden]

We discussed this before, but remind me. Why can't we just run the generator as part of the release process? It would show up in the npm dist, and we don't have to commit to master and maintain duplicates.

[Turbo87]

the things that is most annoying for me personally is https://github.com/ember-cli/ember-cli/blob/master/RELEASE.md#test not working anymore with this setup

[Turbo87]

tl;dr is that I think KISS might make sense here instead of making it infinitely complex just to save us from duplicating two files with 18 lines in total...

[rwjblue]

Agreed