images/team: add christiancouder.jpg
This is to add my picture to the team page as per https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/add_member_to_team_page.md
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This is to add my picture to the team page as per https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/add_member_to_team_page.md