allow possibility to change PropelPDO class connection

core/lib/Thelia/Config/DatabaseConfiguration.php

@@ -60,7 +60,7 @@ class DatabaseConfiguration implements ConfigurationInterface
                             ->cannotBeEmpty()
                         ->end()
                         ->scalarNode("classname")
-                            ->defaultValue("PropelPDO")
+                            ->defaultValue("Propel\Runtime\Connection\PropelPDO")
                         ->end()
                     ->end()
                 ->end()

core/lib/Thelia/Config/DefinePropel.php

@@ -44,7 +44,7 @@ class DefinePropel {
             "dsn" => $connection["dsn"],
             "user" => $connection["user"],
             "password" => $connection["password"],
-            //"classname" => $connection["classname"]
+            "classname" => $connection["classname"]
         );
     }
 }