protractor login helper

 * adds login helper for integration test
 * demonstrate usage with simple test for tenants section
 * fix for testability of auto-refreshing ticker in tenants list
e2e tests will by definition rely on ordering and sequences. Short of putting all tests into 1 file, this is a bad idea and adds a bunch on unnecessary actions which just take up time. https://github.com/angular/protractor/blob/master/lib/taskScheduler.js  - it looks like they do run in order and it looks like it chooses suites or specs. Let's not worry about problems we don't have yet.