[ci skip] Adds tests cases for system note

app/assets/javascripts/notes/components/issue_note_signed_out_widget.vue

 <script>
   export default {
+    name: 'singInLinksNotes',
     data() {
       const { newSessionPath, registerPath } = this.$store.getters.notesData;
 

app/assets/javascripts/notes/components/issue_system_note.vue

@@ -4,6 +4,7 @@
   import issueNoteHeader from './issue_note_header.vue';
 
   export default {
+    name: 'systemNote',
     props: {
       note: {
         type: Object,

spec/javascripts/notes/components/issue_system_note_spec.js

+describe('issue system note', () => {
+  it('should render a list item with correct id', () => {
+
+  });
+
+  it('should render target class is note is target note', () => {
+
+  });
+
+  it('should render svg icon', () => {
+
+  });
+
+  it('should render note header component', () => {
+
+  });
+});