Style improvements (#2475)

* HooksRouter is enabled by default

* Adds middleswares on PromiseRouter, fixes #2410

* Move testing line to helper

* Modernize middlewares.js

* Moves DB uniqueness initialization to DBController, modernize

* Moves testing related code to spec folder

* remove unused _removeHook function

* Adds tests, docs for Analytics and improvements

* nit

* moves back TestUtils

src/Routers/FilesRouter.js

@@ -7,7 +7,7 @@ import mime                from 'mime';
 
 export class FilesRouter {
 
-  getExpressRouter(options = {}) {
+  expressRouter(options = {}) {
     var router = express.Router();
     router.get('/files/:appId/:filename', this.getHandler);