OZG-3936 add missing licence header

...gcloud/alfa/common/LinkedResourceCollectionProcessor.java

...java/de/ozgcloud/alfa/common/LinkedResourceProcessor.java

...loud/alfa/common/LinkedUserProfileResourceSerializer.java

.../alfa/common/LinkedResourceCollectionProcessorITCase.java

...ud/alfa/common/LinkedResourceCollectionProcessorTest.java

...e/ozgcloud/alfa/common/LinkedResourceProcessorITCase.java

.../de/ozgcloud/alfa/common/LinkedResourceProcessorTest.java

...java/de/ozgcloud/alfa/common/LinkedResourceTestUtils.java

...lfa/common/LinkedUserProfileResourceSerializerITCase.java

.../alfa/common/LinkedUserProfileResourceSerializerTest.java

...ice/src/test/java/de/ozgcloud/alfa/common/TestEntity.java