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/ParseGraphQLSchema.spec.js

@@ -9,7 +9,7 @@ describe('ParseGraphQLSchema', () => {
   let parseGraphQLSchema;
   const appId = 'test';
 
-  beforeAll(async () => {
+  beforeEach(async () => {
     parseServer = await global.reconfigureServer({
       schemaCacheTTL: 100,
     });