BA scenario 12

BA Scenario 12 shows the IA sendsing
an application message to two participants.  This is a change from
all other tests where there is just one message sent to a single PA.  If
the test needs to simulate more than one participant then the "single
PA" should register twice.  I would like to suggest that we change
BA1.12 to match what we've done in previous test (see AT 3.1 for an example).

-Doug