Fix no coverage reported for files in app directory of in-repo addons#342

robinborst95 wants to merge 2 commits intoember-cli-code-coverage:masterember-cli-code-coverage/ember-cli-code-coverage:masterfrom

robinborst95:fix/in-repo-addon-approbinborst95/ember-cli-code-coverage:fix/in-repo-addon-appCopy head branch name to clipboard