fix exception handling on scala actors (print instead of die)

...ain/scala/org/bigbluebutton/core/BigBlueButtonActor.scala

...rc/main/scala/org/bigbluebutton/core/CollectorActor.scala

.../src/main/scala/org/bigbluebutton/core/MeetingActor.scala

.../bigbluebutton/freeswitch/FreeswitchConferenceActor.scala