End-to-end test for Multiple Assignees for Issues in the issue page
Docs: https://docs.gitlab.com/ee/user/project/issues/multiple_assignees_for_issues.html
Scenarios:
- Assign two users to the same issue and check that both are shown, and sidebar title changes to 2 Assignees
- Assign six users to the same issue and check that five of them are shown, and a
+1 more
link is also shown. Clicking the link shows the sixth assignee
Edited by Walmyr Lima e Silva Filho