Edraak envs for CMS

Added the CMS edraak environment configs to be consistent with the the `lms` 

Card: https://trello.com/c/IXRSESEj

What to Test
-----
```
$ cd edx-platform
$ git fetch
$ git checkout edraak-cms-envs
```

 - `./manage.py cms runserver --settings=edraak_devstack 0.0.0.0:8001` Should work properly with the `edraak_devstack.py` settings applied
 - `paver run_all_servers --settings=edraak_devstack` and `paver run_all_servers --settings=edraak_aws` should work properly and run both of the LMS and the CMS with no issues.