Minor refactoring for tool tasks

- Don't scan for translations on initialization in TranslationPageGenerator in order to speed up startup time of ToolsRunner
- Extract checking for null / empty array of File#listFiles into a separate method
- Move single method of RuntimeUtils into Utils class

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

@@ -5,9 +5,6 @@ import com.zaxxer.hikari.HikariDataSource;
 import com.zaxxer.hikari.pool.HikariPool.PoolInitializationException;
 import fr.xephi.authme.ConsoleLogger;
 import fr.xephi.authme.data.auth.PlayerAuth;
-import fr.xephi.authme.datasource.Columns;
-import fr.xephi.authme.datasource.DataSource;
-import fr.xephi.authme.datasource.DataSourceType;
 import fr.xephi.authme.security.HashAlgorithm;
 import fr.xephi.authme.security.crypts.HashedPassword;
 import fr.xephi.authme.security.crypts.XFBCRYPT;
@@ -15,8 +12,8 @@ import fr.xephi.authme.settings.Settings;
 import fr.xephi.authme.settings.properties.DatabaseSettings;
 import fr.xephi.authme.settings.properties.HooksSettings;
 import fr.xephi.authme.settings.properties.SecuritySettings;
-import fr.xephi.authme.util.RuntimeUtils;
 import fr.xephi.authme.util.StringUtils;
+import fr.xephi.authme.util.Utils;
 
 import java.sql.Blob;
 import java.sql.Connection;
@@ -100,8 +97,8 @@ public class MySQL implements DataSource {
         this.phpBbGroup = settings.getProperty(HooksSettings.PHPBB_ACTIVATED_GROUP_ID);
         this.wordpressPrefix = settings.getProperty(HooksSettings.WORDPRESS_TABLE_PREFIX);
         this.poolSize = settings.getProperty(DatabaseSettings.MYSQL_POOL_SIZE);
-        if(poolSize == -1) {
-            poolSize = RuntimeUtils.getCoreCount();
+        if (poolSize == -1) {
+            poolSize = Utils.getCoreCount();
         }
     }