Add code to handle SimEnd to default behavior in impl java

[MartyBurns]

Version information

af5cbf19d66d2b5400575ddbc3a9e4ffe91d9a4f

Observed behavior

When terminiating the simulation, the federate prints an unhandled interaction for SimEnd even though there is default handling of this message in SynchronizedFederate (in ucef-core).

Expected behavior

Should not print out warning.

Steps to reproduce issue

Create a federation; run; send TERMINATE message

[MartyBurns]

Can be resolved by modifying the code generated for the implementation java class:

    private void checkReceivedSubscriptions() {
        log.debug("in checkReceivedSubscriptions");

        InteractionRoot interaction = null;
        while ((interaction = getNextInteractionNoWait()) != null) {
            if (interaction instanceof ThePong) {
                handleInteractionClass((ThePong) interaction);
            } else if (interaction instanceof SimEnd) {
                ////////////////////////////////////////////////////
                // TODO perform any additional handling of SimEnd //
                ////////////////////////////////////////////////////
            }
            else {
                log.warn("unhandled interaction: {}", interaction.getClassName());
            }
        }
     }

only the "else" clause is needed:

            } else if (interaction instanceof SimEnd) {
                ////////////////////////////////////////////////////
                // TODO perform any additional handling of SimEnd //
                ////////////////////////////////////////////////////
            }