Fixed EZP-20755: Names are supposed to have a default limit of 150 characters

Name should have a default maximum length as defined in https://github.com/ezsystems/ezpublish-kernel/blob/master/eZ/Publish/Core/Repository/NameSchemaService.php#L72, however it is overriden at: https://github.com/ezsystems/ezpublish-kernel/blob/master/eZ/Publish/Core/Repository/Repository.php#L189 with a wrong default value of "0"