Change Tickets to use need_swa. need_qualification

[olindenbaum]

There are columns in the event_ticket table which are not being used. We are still using values within the details json.

• [ ] Change src/administrator/event_ticket model, view, table and controller to include the boolean values as editable directly from the database.
• [ ] Change the src/site/ticket purchase page to use the values from the boolean rather than the deserialised json.