Fixes most of what's mentioned in https://gitlab.com/gitlab-com/www-gitlab-com/merge_requests/6683#note_35594132
- Autogenerates the Solutions index page.
- Changes
/solutions/chat.htmlto/solutions/chat, etc. - Fixes 404s
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Fixes most of what's mentioned in https://gitlab.com/gitlab-com/www-gitlab-com/merge_requests/6683#note_35594132
/solutions/chat.html to /solutions/chat, etc.