NEW: Create a DB static function to check deprecated table names

It looks like in many places, there some code to change table name from old "french" names that are deprecated throughout version releases in favour of english names for internationalisation of Dolibarr.
I propose to place this code as a common static function in the DoliDB class (which is generally contained in every other class).
This would allow to continue to change table names without having to check every class for usage of old names and fix it.
Usage: 
If object has no $db property;
`$table_name = DoliDB::checkTableName($table_name);`
if object has a $db property:
`$table_name = $this->db->checkTableName($table_name);`

htdocs/core/db/DoliDB.class.php

@@ -440,4 +440,20 @@ public function getRows($sql)
 
 		return false;
 	}
+	static $_deprecated_table_names = array(
+		'thirdparty' => 'societe',
+		'contact' => 'socpeople',
+		'invoice' => 'facture',
+		'order_supplier' => 'commande_fournisseur',
+		'categorie_extrafields' => 'categories_extrafields'
+	);
+	/**
+	 * Check table name and change it to new version table name if table name is deprecated.
+	 *
+	 * @param   string  $table_name     table name to check
+	 * @return  string  new table name or original one if no change is required
+	 */
+	static public function checkTableName($table_name) {
+		return CommonObject::$_deprecated_table_names[$table_name]  ?? $table_name;
+	}
 }