Introduce proper Ticket Aggregation protocol types and remove legacy binary encoding

[NumberFour8]

The Ticket Aggregation protocol is missing binary format description. As result, raw Business Objects (such as AcknowledgedTicket) are sent over the wire, which is a bad practice and huge risk of breaking future backwards compatibility.

To counter the problem, temporary solution has been introduced in #6156 . This however only a temporary solution to allow Ticket Aggregation to be backwards compatible across 2.x releases.

In 3.0, a completely new binary format should be introduced and the temporary solution should be removed.