Fix ignore on ember-qunit
Fix ignore on ember-qunit

A recent release of ember-cli updated this package name, but the ignore
configuration didn't get updated at the same time.

ilios/frontend,jrjohnson/frontend,thecoolestguy/frontend,djvoa12/frontend,ilios/frontend,thecoolestguy/frontend,dartajax/frontend,dartajax/frontend,jrjohnson/frontend,djvoa12/frontend