This addition adds the possibility for attribute driven auto wiring via an ObjectPostProcessor.
Fine grain control is given by a Qualifier and Value attribute.
The Value attribute is supporting the PropertyPlaceHolder and Expression language.
Changes are made to the spring-object**.xsd to support qualifier and meta definition used by the qualifier attribute. This was implemented in the same way the Java version is using it. Additionally I added the primary attribute for object select if one type is returning more than 1 object. It is also implemented in the way Java uses it.