Allow single server instance in test suite (#7262)

* initial pass

* reconfigureServer when needed

* finish postgres tests

* mongo tests

* more tests

* clean up

* re-add skipped test

* Fix transaction tests

* handle batch

* AuthenticationAdapter fix

* More reconfiguration

* clean up

* properly terminate cli servers

* handle Parse.Push

* Flaky PushController

* ensure reconfigureServer when changed

* fix postgres tests

* remove console.log

* LiveQuery spec remove duplicates and listeners

spec/CloudCodeLogger.spec.js

@@ -14,6 +14,7 @@ describe('Cloud Code Logger', () => {
     return reconfigureServer({
       // useful to flip to false for fine tuning :).
       silent: true,
+      logLevel: undefined,
     })
       .then(() => {
         return Parse.User.signUp('tester', 'abc')