OZG-6735 refactor data mapping; extract technic

...ozgcloud/eingang/common/formdata/FormDataTestFactory.java

...ain/java/de/ozgcloud/eingang/fim/AntragstellerMapper.java

...rc/main/java/de/ozgcloud/eingang/fim/FimBasedAdapter.java

.../src/main/java/de/ozgcloud/eingang/fim/FimDataMapper.java

...er/src/main/java/de/ozgcloud/eingang/fim/FimDataUtil.java

.../main/java/de/ozgcloud/eingang/fim/FimDocumentReader.java

...pter/src/main/java/de/ozgcloud/eingang/fim/FimScheme.java

...c/main/java/de/ozgcloud/eingang/fim/FimSchemeAdapter.java

...main/java/de/ozgcloud/eingang/fim/FimSchemeCatalogue.java

...ain/java/de/ozgcloud/eingang/fim/FimSchemeIdentifier.java

...ter/src/main/java/de/ozgcloud/eingang/fim/FimService.java

...r/src/main/java/de/ozgcloud/eingang/fim/HeaderMapper.java

...in/java/de/ozgcloud/eingang/fim/UnknownSchemeAdapter.java

...va/de/ozgcloud/eingang/fim/common/xml/DocumentHelper.java

...java/de/ozgcloud/eingang/fim/AntragstellerMapperTest.java

...ava/de/ozgcloud/eingang/fim/AntragstellerTestFactory.java

...test/java/de/ozgcloud/eingang/fim/FimBaseAdapterTest.java

...t/java/de/ozgcloud/eingang/fim/FimBasedAdapterITCase.java

...est/java/de/ozgcloud/eingang/fim/FimBasedAdapterTest.java

.../test/java/de/ozgcloud/eingang/fim/FimDataMapperTest.java