[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/CLI.spec.js

@@ -227,6 +227,8 @@ describe('execution', () => {
       'test',
       '--databaseURI',
       'mongodb://localhost/test',
+      '--port',
+      '1339',
     ]);
     childProcess.stdout.on('data', data => {
       data = data.toString();
@@ -247,6 +249,8 @@ describe('execution', () => {
       'test',
       '--databaseURI',
       'mongodb://localhost/test',
+      '--port',
+      '1340',
       '--mountGraphQL',
     ]);
     let output = '';
@@ -271,6 +275,8 @@ describe('execution', () => {
       'test',
       '--databaseURI',
       'mongodb://localhost/test',
+      '--port',
+      '1341',
       '--mountGraphQL',
       '--mountPlayground',
     ]);