fixed tests for 3.10

Author: rashtao

src/test/java/com/arangodb/ArangoCollectionTest.java

@@ -624,6 +624,7 @@ void updateDocumentWithDifferentReturnType(ArangoCollection collection) {
     void updateDocumentUpdateRev(ArangoCollection collection) {
         final BaseDocument doc = new BaseDocument(UUID.randomUUID().toString());
         final DocumentCreateEntity<BaseDocument> createResult = collection.insertDocument(doc, null);
+        doc.addAttribute("foo", "bar");
         final DocumentUpdateEntity<BaseDocument> updateResult = collection.updateDocument(createResult.getKey(), doc,
          null);
         assertThat(doc.getRevision()).isNull();