Refactor

As all points from the epic refactor issue are closed #47 (closed) I am merging this in to master in order to unblock development.

frontend/test/unit/specs/Hello.spec.js

-import Vue from 'vue'
-import Login from '@/components/Login'
-
-describe('Login.vue', () => {
-  it('is doing nothing but ensure that we can test', () => {
-    data = {"submissions": [
-            {
-                "type": "Aufgabe 01",
-                "text": "Hallo, was geht denn da?",
-                "feedback": null,
-                "score": null,
-                "full_score": 12
-            }
-        ]}
-  })
-})