disc dropper time delay

src/engine/objects/Mob.java

@@ -80,6 +80,7 @@ public class Mob extends AbstractIntelligenceAgent {
     private DeferredPowerJob weaponPower;
     private DateTime upgradeDateTime = null;
     private boolean lootSync = false;
+    public int discDelay = 6;
 
     // New Mobile constructor.  Fill in the blanks and then call
     // PERSIST.