Migrate to ember 2.7 + correct jquery null context error + declare shim for popcorn (instead of silencing the JSHint error)
NOTE
====
This project's specs depend on puppet core, and thus they require the
`puppetlabs_spec_helper` project. For more information please see the README
in that project, which can be found here: [puppetlabs spec
helper](https://github.com/puppetlabs/puppetlabs_spec_helper)