Refactor services and controllers to use ID for updates and standardize DAO method names

hibernate-project/test.http

@@ -0,0 +1,14 @@
+### GET request to example server
+GET http://localhost/users
+
+###
+POST http://localhost/users/
+Content-Type: application/json
+
+{
+  "name": "John Doe",
+  "email": "john.doe@example.com"
+}
+
+###
+DELETE http://localhost/articles/13