Redirect on test entry creation

[zelzhan]

When user creates the test-entry, he will stay on the same page. He should be notified that he successfully created test entry and be redirected to the home page or to the same page.

[zelzhan]

One should implement the logic in libs/frontend/test-entry/src/lib/components/create-test-entry/create-test-entry.component.ts by injecting the router in constructor and calling router.navigate. See https://angular.io/guide/router for more details.