change demo testcase file name

test/data/simple_demo_auth_hardcode.yml

@@ -0,0 +1,39 @@
+-
+  name: create user which does not exist
+  request:
+    url: http://127.0.0.1:5000/api/users/1000
+    method: POST
+    headers:
+      Content-Type: application/json
+      authorization: a83de0ff8d2e896dbd8efb81ba14e17d
+      random: A2dEx
+    json:
+      name: "user1"
+      password: "123456"
+  response:
+    status_code: 201
+    headers:
+      Content-Type: application/json
+    body:
+      success: true
+      msg: user created successfully.
+
+-
+  name: create user which existed
+  request:
+    url: http://127.0.0.1:5000/api/users/1000
+    method: POST
+    headers:
+      Content-Type: application/json
+      authorization: a83de0ff8d2e896dbd8efb81ba14e17d
+      random: A2dEx
+    json:
+      name: "user1"
+      password: "123456"
+  response:
+    status_code: 500
+    headers:
+      Content-Type: application/json
+    body:
+      success: false
+      msg: user already existed.