tests: remove loadSettings.js for backend tests.

The old loadSettings.js was a way of customizing settings upon load, because
the Settings module did not offer this functionality. But it did not work well,
since all the default settings were not loaded.

Let's get rid of loadSettings.js for the bulk of the tests (the "backend"
specs). For the "container" specs, we'll keep it in place until/if we rewrite
Settings.js making it less brittle.

tests/backend/specs/api/chat.js

@@ -1,7 +1,7 @@
 var assert = require('assert')
  supertest = require(__dirname+'/../../../../src/node_modules/supertest'),
         fs = require('fs'),
-  settings = require(__dirname+'/../../loadSettings').loadSettings(),
+  settings = require(__dirname + '/../../../../src/node/utils/Settings'),
        api = supertest('http://'+settings.ip+":"+settings.port),
       path = require('path');