fix: #10809, test runner to only run tests for plugins included in `test_plugins`

test/plugins-installed.js

@@ -1,14 +1,16 @@
 'use strict';
 
+const nconf = require('nconf');
 const path = require('path');
 const fs = require('fs');
 const db = require('./mocks/databasemock');
 
-const installedPlugins = fs.readdirSync(path.join(__dirname, '../node_modules'))
-	.filter(p => p.startsWith('nodebb-'));
+const active = nconf.get('test_plugins') || [];
+const toTest = fs.readdirSync(path.join(__dirname, '../node_modules'))
+	.filter(p => p.startsWith('nodebb-') && active.includes(p));
 
 describe('Installed Plugins', () => {
-	installedPlugins.forEach((plugin) => {
+	toTest.forEach((plugin) => {
 		const pathToTests = path.join(__dirname, '../node_modules', plugin, 'test');
 		try {
 			require(pathToTests);