OZG-1598 move common code to common module

...c/main/java/de/itvsh/kop/eingangsadapter/Application.java

...angsadapter/common/errorhandling/FunctionalException.java

...gangsadapter/common/errorhandling/TechnicalException.java

...sh/kop/eingangsadapter/common/formdata/Antragsteller.java

...e/itvsh/kop/eingangsadapter/common/formdata/FormData.java

...itvsh/kop/eingangsadapter/common/formdata/FormHeader.java

...vsh/kop/eingangsadapter/common/formdata/IncomingFile.java

...op/eingangsadapter/common/formdata/IncomingFileGroup.java

...op/eingangsadapter/common/formdata/ZustaendigeStelle.java

...e/itvsh/kop/eingangsadapter/IFAdapterApplicationTest.java

...angsadapter/common/formdata/AntragstellerTestFactory.java

.../eingangsadapter/common/formdata/FormDataTestFactory.java

...ingangsadapter/common/formdata/FormHeaderTestFactory.java

...adapter/common/formdata/IncomingFileGroupTestFactory.java

...gangsadapter/common/formdata/IncomingFileTestFactory.java

...adapter/common/formdata/ZustaendigsStelleTestFactory.java