Make it so app works without CiviCRM

Without doing much investigation, I just hit the below error while running a cucumber test in a private branch:

```
ActionView::Template::Error: uninitialized constant CiviCRM::SUPPORTERS_API_KEY
from /home/kentos/dev/work/web/action-center-platform/lib/civicrm.rb:91:in `base_params'
```

application.yml doesn't define a CiviCRM in my test env.

Start in lib/civicrm.rb around line 91, where base_params raises the missing CiviCRM::SUPPORTERS_API_KEY error, and check how application.yml is used in the test environment. Reproduce the failure with the cucumber test mentioned in the issue; done means the app and test run without CiviCRM configuration or this constant error.

Written by the indexing model from the issue text.