rename validators to validate

examples/quickstart-demo-rev-0.yml

@@ -10,7 +10,7 @@
             app_version: 2.8.6
         json:
             sign: 19067cf712265eb5426db8d3664026c1ccea02b9
-    validators:
+    validate:
         - {"check": "status_code", "comparator": "eq", "expected": 200}
         - {"check": "content.token", "comparator": "len_eq", "expected": 16}
 
@@ -25,6 +25,6 @@
         json:
             name: "user1"
             password: "123456"
-    validators:
+    validate:
         - {"check": "status_code", "comparator": "eq", "expected": 201}
         - {"check": "content.success", "comparator": "eq", "expected": true}