OZG-6891 KOP-2735 cleanup

src/test/java/de/ozgcloud/xta/client/extension/XtaMessageExampleLoader.java

@@ -180,7 +180,7 @@ public class XtaMessageExampleLoader {
 	}
 
 	private static DataHandler createContentDataHandler(byte[] data) {
-		return new DataHandler(new FileDataSource("application/octet-stream"));
+		return new DataHandler(new ByteArrayDataSource(data, "application/octet-stream"));
 	}
 
 	private static byte[] readBytesFromResource(String path) {