Update Manager.java

add log

Author: sean-liu55

src/main/java/org/tron/core/db/Manager.java

@@ -1029,6 +1029,10 @@ public synchronized BlockCapsule generateBlock(
       if (!witnessController.validateWitnessSchedule(witnessCapsule.getAddress(), when)) {
         logger.info("It's not my turn, "
             + "and the first block after the maintenance period has just been processed");
+        
+        logger.info("when:{},lastHeadBlockIsMaintenanceBefore:{},lastHeadBlockIsMaintenanceAfter:{}",
+                when, lastHeadBlockIsMaintenanceBefore,lastHeadBlockIsMaintenance() );
+        
         return null;
       }
    // }