Scenarios missing their deps when no bower and no package-lock.json

[ef4]

If your app does not have bower and does not have a package-lock.json, it's possible to get into a state where ember-try installs bower while accidentally producing a package-lock.json that only contains bower.

Then apparently during scenario setup it respects the package-lock.json and you end up missing all your packages.

[rwjblue]

Yes, ember-try + npm@5 is a very bad experience at the moment.