Improve single schema cache (#7214)

* Initial Commit

* fix flaky test

* temporary set ci timeout

* turn off ci check

* fix postgres tests

* fix tests

* node flaky test

* remove improvements

* Update SchemaPerformance.spec.js

* fix tests

* revert ci

* Create Singleton Object

* properly clear cache testing

* Cleanup

* remove fit

* try PushController.spec

* try push test rewrite

* try push enqueue time

* Increase test timeout

* remove pg server creation test

* xit push tests

* more xit

* remove skipped tests

* Fix conflicts

* reduce ci timeout

* fix push tests

* Revert "fix push tests"

This reverts commit 05aba62f1cbbca7d5d3e80b9444529f59407cb56.

* improve initialization

* fix flaky tests

* xit flaky test

* Update CHANGELOG.md

* enable debug logs

* Update LogsRouter.spec.js

* create initial indexes in series

* lint

* horizontal scaling documentation

* Update Changelog

* change horizontalScaling db option

* Add enableSchemaHooks option

* move enableSchemaHooks to databaseOptions

src/Config.js

@@ -3,7 +3,6 @@
 // mount is the URL for the root of the API; includes http, domain, etc.
 
 import AppCache from './cache';
-import SchemaCache from './Controllers/SchemaCache';
 import DatabaseController from './Controllers/DatabaseController';
 import net from 'net';
 import {
@@ -35,12 +34,7 @@ export class Config {
     config.applicationId = applicationId;
     Object.keys(cacheInfo).forEach(key => {
       if (key == 'databaseController') {
-        const schemaCache = new SchemaCache(
-          cacheInfo.cacheController,
-          cacheInfo.schemaCacheTTL,
-          cacheInfo.enableSingleSchemaCache
-        );
-        config.database = new DatabaseController(cacheInfo.databaseController.adapter, schemaCache);
+        config.database = new DatabaseController(cacheInfo.databaseController.adapter);
       } else {
         config[key] = cacheInfo[key];
       }