SettableClock: Changed defaultOverdueClockEventHandlingMode to execut…

…e because it may actually happen in a correctly set up simulation.

When the clock is being set, it may happen that some clock event becomes overdue.
The old default setting may mislead the user to think that this is an error.

src/inet/clock/model/SettableClock.ned

@@ -17,7 +17,7 @@ package inet.clock.model;
 module SettableClock extends OscillatorBasedClock
 {
     parameters:
-        string defaultOverdueClockEventHandlingMode @enum("execute","skip","error") = default("error");
+        string defaultOverdueClockEventHandlingMode @enum("execute","skip","error") = default("execute");
         @class(SettableClock);
 }