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/RestQuery.spec.js

@@ -315,6 +315,9 @@ describe('rest query', () => {
 });
 
 describe('RestQuery.each', () => {
+  beforeEach(() => {
+    config = Config.get('test');
+  });
   it('should run each', async () => {
     const objects = [];
     while (objects.length != 10) {