Move eccn from Accounting to Sales Process
Related to discussion on this commit:
https://gitlab.com/gitlab-com/www-gitlab-com/commit/ea19b328c16d3bc25200d9a1888b2352cbc4b765#note_2915809
\cc @sytses
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Related to discussion on this commit:
https://gitlab.com/gitlab-com/www-gitlab-com/commit/ea19b328c16d3bc25200d9a1888b2352cbc4b765#note_2915809
\cc @sytses