This is obsolete functionality. It is no longer supported or maintained.
IDM Model Web Service Interface was deprecated in midPoint 4.0. Therefore the sample client does not bring any substantial value. The client may even encourage the users to use deprecated SOAP functionality. Therefore all the SOAP clients were removed from midPoint 4.0.
Model Web Service client is a simple and small Java component located in
model/model-client subdirectory of midPoint source code. This component is a web service client written in Java using JAX-WS and JAX-B standards. It is designed to be independent on midPoint main code and midPoint libraries. Its purpose it to be used as a simple library component in applications that access midPoint web service.