Remove need for thread locks in profile loading, just reschedule as needed. also stagger based on number of previous attempts.

src/main/java/com/gmail/nossr50/commands/database/ConvertDatabaseCommand.java

@@ -62,7 +62,7 @@ public class ConvertDatabaseCommand implements CommandExecutor {
                         mcMMO.getDatabaseManager().saveUser(profile);
                     }
 
-                    new PlayerProfileLoadingTask(player).runTaskTimerAsynchronously(mcMMO.p, 1, 100); // 1 Tick delay to ensure the player is marked as online before we begin loading
+                    new PlayerProfileLoadingTask(player).runTaskLaterAsynchronously(mcMMO.p, 1); // 1 Tick delay to ensure the player is marked as online before we begin loading
                 }
 
                 new DatabaseConversionTask(oldDatabase, sender, previousType.toString(), newType.toString()).runTaskAsynchronously(mcMMO.p);

src/main/java/com/gmail/nossr50/commands/experience/ConvertExperienceCommand.java

@@ -38,7 +38,7 @@ public class ConvertExperienceCommand implements CommandExecutor {
                 new FormulaConversionTask(sender, newType).runTaskLater(mcMMO.p, 1);
 
                 for (Player player : mcMMO.p.getServer().getOnlinePlayers()) {
-                    new PlayerProfileLoadingTask(player).runTaskTimerAsynchronously(mcMMO.p, 1, 100); // 1 Tick delay to ensure the player is marked as online before we begin loading
+                    new PlayerProfileLoadingTask(player).runTaskLaterAsynchronously(mcMMO.p, 1); // 1 Tick delay to ensure the player is marked as online before we begin loading
                 }
 
                 return true;