rm references to vpack

Author: rashtao

driver/src/test/java/com/arangodb/ArangoDatabaseTest.java

@@ -1224,7 +1224,7 @@ void transactionNumber(ArangoDatabase db) {
 
     @ParameterizedTest(name = "{index}")
     @MethodSource("dbs")
-    void transactionVPack(ArangoDatabase db) {
+    void transactionJsonNode(ArangoDatabase db) {
         final TransactionOptions options = new TransactionOptions().params(JsonNodeFactory.instance.textNode("test"));
         final JsonNode result = db.transaction("function (params) {return params;}", JsonNode.class, options);
         assertThat(result.isTextual()).isTrue();

driver/src/test/java/com/arangodb/async/example/document/GetDocumentExampleTest.java

@@ -69,7 +69,7 @@ void getAsBaseDocument() throws InterruptedException, ExecutionException {
     }
 
     @Test
-    void getAsVPack() throws InterruptedException, ExecutionException {
+    void getAsJsonNode() throws InterruptedException, ExecutionException {
         collection.getDocument(key, JsonNode.class)
                 .whenComplete((doc, ex) -> {
                     assertThat(doc).isNotNull();

driver/src/test/java/com/arangodb/example/document/AqlQueryWithSpecialReturnTypesExampleTest.java

@@ -64,11 +64,11 @@ void aqlWithLimitQueryAsJsonObject() {
         final ArangoCursor<ObjectNode> cursor = db.query(query, bindVars, null, ObjectNode.class);
         assertThat((Object) cursor).isNotNull();
         while (cursor.hasNext()) {
-            final ObjectNode vpack = cursor.next();
-            assertThat(vpack.get("name").asText())
+            final ObjectNode node = cursor.next();
+            assertThat(node.get("name").asText())
                     .isIn("TestUser11", "TestUser13", "TestUser15", "TestUser17", "TestUser19");
-            assertThat(vpack.get("gender").asText()).isEqualTo(Gender.FEMALE.name());
-            assertThat(vpack.get("age").asInt()).isIn(21, 23, 25, 27, 29);
+            assertThat(node.get("gender").asText()).isEqualTo(Gender.FEMALE.name());
+            assertThat(node.get("age").asInt()).isIn(21, 23, 25, 27, 29);
         }
     }