[OLINGO-365] Small cleanup
[OLINGO-365] Composable function invocation refactory - in progress
[OLINGO-365] All former tests now pass with new StructuredComposableInvokerInvocationHandler: time to add specific checks for new features
Turning log4j.properties into log4j.xml and tuning things to avoid Tomcat's DEBUG statement polluting the log file
[OLINGO-365] Adding checks for enhanced composable invoker