Move ember-prop-types config to dummy app

[job13er]

This project uses semver, please check the scope of this pr:

• [ ] #none# - documentation fixes and/or test additions
• [x] #patch# - backwards-compatible bug fix
• [ ] #minor# - adding functionality in a backwards-compatible manner
• [ ] #major# - incompatible API change

CHANGELOG

• Fixed config/environment.js to no longer affect consumer's environment (resolves #24)

[quincyle]

Approved

[coveralls]

Changes Unknown when pulling 8a7622c4f8773afdc97d0a7393d3cd2881c6682d on job13er:fix-environment into on ciena-frost:master.