Move all E2E dependencies into its own folder, run from there (#3068)

* Move all E2E dependencies into its own folder, run from there

* Run flaky-tests from E2E folder

* This should work better

* Fix E2E test for Linux

* Fix for Windows, fix lint

e2e/specs/startup/config.test.js

@@ -58,7 +58,7 @@ describe('config', function desc() {
     });
 
     it('MM-T4402 should upgrade v0 config file', async () => {
-        const Config = require('../../../src/common/config').Config;
+        const Config = require('src/common/config').Config;
         const newConfig = new Config(env.configFilePath);
         const oldConfig = {
             url: env.exampleURL,