#1874 Introduce individual ConsoleLogger instance per class (#1875)

* #1874 Introduce individual ConsoleLogger instance per class
- Create ConsoleLoggerFactory from which a separate logger can be created for each class
- Allows to support individual log level settings in the future

* Fix CodeStyle issue

* Replace full class name with import

* Update usages after merge from master

src/main/java/fr/xephi/authme/datasource/converter/VAuthConverter.java

@@ -4,6 +4,7 @@ import fr.xephi.authme.ConsoleLogger;
 import fr.xephi.authme.data.auth.PlayerAuth;
 import fr.xephi.authme.datasource.DataSource;
 import fr.xephi.authme.initialization.DataFolder;
+import fr.xephi.authme.output.ConsoleLoggerFactory;
 import org.bukkit.Bukkit;
 import org.bukkit.OfflinePlayer;
 import org.bukkit.command.CommandSender;
@@ -18,6 +19,7 @@ import static fr.xephi.authme.util.FileUtils.makePath;
 
 public class VAuthConverter implements Converter {
 
+    private final ConsoleLogger logger = ConsoleLoggerFactory.get(VAuthConverter.class);
     private final DataSource dataSource;
     private final File vAuthPasswordsFile;
 
@@ -58,7 +60,7 @@ public class VAuthConverter implements Converter {
                 dataSource.saveAuth(auth);
             }
         } catch (IOException e) {
-            ConsoleLogger.logException("Error while trying to import some vAuth data", e);
+            logger.logException("Error while trying to import some vAuth data", e);
         }
     }