[Terry N.] capture initial sim time

CoTreceiver/src/main/java/edu/nps/moves/cot/dis/CoTMsgParserDisRunner.java

@@ -182,6 +182,7 @@ public class CoTMsgParserDisRunner extends CoTparser
         if (pduFactory == null)
             pduFactory      = getDisChannel().getPduFactory();
         entityStatePdu_1    = pduFactory.makeEntityStatePdu();
+        simulationTimeInitial = entityStatePdu_1.getTimestamp();
 //        entityStatePdu_2    = pduFactory.makeEntityStatePdu();
 //        firePdu_1a          = pduFactory.makeFirePdu();
 //        firePdu_1b          = pduFactory.makeFirePdu();