#575 Hotfix for reload support

- Create temporary method for reloading any stateful entities -> a lot of duplicated code, to be fixed soon within #432
- Remove unused methods

src/main/java/fr/xephi/authme/datasource/CacheDataSource.java

@@ -162,12 +162,6 @@ public class CacheDataSource implements DataSource {
         }
     }
 
-    @Override
-    public void reload() { // unused method
-        source.reload();
-        cachedAuths.invalidateAll();
-    }
-
     @Override
     public synchronized boolean updateEmail(final PlayerAuth auth) {
         boolean result = source.updateEmail(auth);

src/main/java/fr/xephi/authme/datasource/DataSource.java

@@ -121,8 +121,6 @@ public interface DataSource {
      */
     void close();
 
-    void reload();
-
     /**
      * Method purgeBanned.
      *

src/main/java/fr/xephi/authme/datasource/FlatFile.java

@@ -419,10 +419,6 @@ public class FlatFile implements DataSource {
     public synchronized void close() {
     }
 
-    @Override
-    public void reload() {
-    }
-
     @Override
     public boolean updateEmail(PlayerAuth auth) {
         if (!isAuthAvailable(auth.getNickname())) {

src/main/java/fr/xephi/authme/datasource/MySQL.java

@@ -3,7 +3,6 @@ package fr.xephi.authme.datasource;
 import com.google.common.annotations.VisibleForTesting;
 import com.zaxxer.hikari.HikariDataSource;
 import com.zaxxer.hikari.pool.HikariPool.PoolInitializationException;
-import fr.xephi.authme.AuthMe;
 import fr.xephi.authme.ConsoleLogger;
 import fr.xephi.authme.cache.auth.PlayerAuth;
 import fr.xephi.authme.security.HashAlgorithm;
@@ -695,17 +694,6 @@ public class MySQL implements DataSource {
         return false;
     }
 
-    @Override
-    public void reload() {
-        try {
-            reloadArguments();
-        } catch (Exception ex) {
-            ConsoleLogger.logException("Can't reconnect to MySQL database... " +
-                "Please check your MySQL configuration! Encountered", ex);
-            AuthMe.getInstance().stopOrUnload();
-        }
-    }
-
     @Override
     public synchronized void close() {
         if (ds != null && !ds.isClosed()) {

src/main/java/fr/xephi/authme/datasource/SQLite.java

@@ -359,10 +359,6 @@ public class SQLite implements DataSource {
         }
     }
 
-    @Override
-    public void reload() {
-    }
-
     private void close(Statement st) {
         if (st != null) {
             try {