CT-927 Change scope of :with_messages trait
CT-927 Change scope of :with_messages trait

Interestingly this trait was not being used. I have move it out
of the general case factory and can now be used on any type of
case

ministryofjustice/correspondence_tool_staff,ministryofjustice/correspondence_tool_staff,ministryofjustice/correspondence_tool_staff,ministryofjustice/correspondence_tool_staff,ministryofjustice/correspondence_tool_staff