Use ohana-api-test for specs

This PR basically just updates the specs to point to ohana-api-test

I created a new instance of the API on Heroku to use with specs so that we can let others play with ohana-api-demo without affecting the tests. Also, ohana-api-test defaults to 1 result per page, but I want to change ohana-api-demo to use 30 by default. This PR needs to merged first though.
Merge pull request #375 from codeforamerica/use-test-app-for-specs

Use ohana-api-test for specs