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/Controllers/SchemaController.js

@@ -268,7 +268,7 @@ const dbTypeMatchesObjectType = (dbType, objectType) => {
 
 // Stores the entire schema of the app in a weird hybrid format somewhere between
 // the mongo format and the Parse format. Soon, this will all be Parse format.
-class SchemaController {
+export default class SchemaController {
   _dbAdapter;
   data;
   perms;