Fix missing schema type in YAML example spec (#1923)

* Fix missing schema type in YAML example spec

* Moved type: object into allOf

Author: sjaensch

examples/v2.0/yaml/petstore-expanded.yaml

@@ -113,12 +113,14 @@ definitions:
       - $ref: '#/definitions/NewPet'
       - required:
         - id
+        type: "object"
         properties:
           id:
             type: integer
             format: int64
 
   NewPet:
+    type: "object"
     required:
       - name  
     properties:
@@ -128,6 +130,7 @@ definitions:
         type: string    
 
   Error:
+    type: "object"
     required:
       - code
       - message

examples/v2.0/yaml/petstore.yaml

@@ -74,6 +74,7 @@ paths:
             $ref: '#/definitions/Error'
 definitions:
   Pet:
+    type: "object"
     required:
       - id
       - name
@@ -90,6 +91,7 @@ definitions:
     items:
       $ref: '#/definitions/Pet'
   Error:
+    type: "object"
     required:
       - code
       - message