OZG-5044 Moved setting files, settings->setting

src/main/java/de/ozgcloud/admin/setting/AlfaSettingDTO.java

...java/de/ozgcloud/admin/setting/ApplicationSettingDTO.java

...java/de/ozgcloud/admin/setting/DataRestConfiguration.java

src/main/java/de/ozgcloud/admin/setting/Setting.java

src/main/java/de/ozgcloud/admin/setting/SettingBody.java

...main/java/de/ozgcloud/admin/setting/SettingConstants.java

.../ozgcloud/admin/setting/SettingEnvironmentRepository.java

src/main/java/de/ozgcloud/admin/setting/SettingMapper.java

...ain/java/de/ozgcloud/admin/setting/SettingRepository.java

src/main/java/de/ozgcloud/admin/setting/SettingService.java

...main/java/de/ozgcloud/admin/setting/SettingValidator.java

...a/de/ozgcloud/admin/setting/VorgangManagerSettingDTO.java

...ain/java/de/ozgcloud/admin/setting/postfach/Absender.java

...gcloud/admin/setting/postfach/AbsenderVorgangManager.java

.../ozgcloud/admin/setting/postfach/PostfachSettingBody.java

.../de/ozgcloud/admin/setting/AlfaSettingDTOTestFactory.java

.../de/ozgcloud/admin/setting/PropertySourceTestFactory.java

...a/de/ozgcloud/admin/setting/SettingEnvironmentITCase.java

...cloud/admin/setting/SettingEnvironmentRepositoryTest.java

...ozgcloud/admin/setting/SettingEnvironmentTestFactory.java