Preserve order of messages

[David Dauer]

Clients do not receive messages sent out by the server in the original order as advised on the documentation (http://www.tacenergy.org/docs/latest/manual/index.html -> Sequence Diagrams -> Time advancement)

For Clients relying on the order (e.g. receiving a Product before a Forecast), this means they have to work around this issue. A fix in the server would be preferable.

Possible solution: Message Groups: http://activemq.apache.org/how-do-i-preserve-order-of-messages.html