[WIP] Enable test suite to be randomized (#7265)

* initial run

* Update ParseGraphQLServer.spec.js

* temporarily enable reporter

* Bump retry limit

* fix undefined database

* try to catch error

* Handle LiveQueryServers

* Update Config.js

* fast-fail false

* Remove usage of AppCache

* oops

* Update contributing guide

* enable debugger, try network retry attempt 1

* Fix ldap unbinding

* move non specs to support

* add missing mock adapter

* fix Parse.Push

* RestController should match batch.spec.js

* Remove request attempt limit

* handle index.spec.js

* Update CHANGELOG.md

* Handle error: tuple concurrently updated

* test transactions

* Clear RedisCache after every test

* LoggerController.spec.js

* Update schemas.spec.js

* finally fix transactions

* fix geopoint deadlock

* transaction with clean database

* batch.spec.js

spec/VerifyUserPassword.spec.js

@@ -1,7 +1,7 @@
 'use strict';
 
 const request = require('../lib/request');
-const MockEmailAdapterWithOptions = require('./MockEmailAdapterWithOptions');
+const MockEmailAdapterWithOptions = require('./support/MockEmailAdapterWithOptions');
 
 const verifyPassword = function (login, password, isEmail = false) {
   const body = !isEmail ? { username: login, password } : { email: login, password };