OZG-1523 fixed more tests

goofy-server/src/test/java/de/itvsh/goofy/kommentar/KommentarRemoteServiceTest.java

@@ -81,6 +81,8 @@ class KommentarRemoteServiceTest {
 		@BeforeEach
 		void mockStub() {
 			when(vorgangAttachedItemServiceStub.getById(any())).thenReturn(response);
+			when(grpcObjectMapper.mapFromGrpc(any())).thenReturn(KommentarTestFactory.createAsMap());
+			when(mapper.fromItemMap(any())).thenReturn(KommentarTestFactory.create());
 		}
 
 		@Test