Bring schema test coverage back to 100%

Test cases for
- Response Object with summary
- $self
- Parameter Object with in:querystring

Author: ralfhandl

tests/schema/pass/info-object-example.yaml

@@ -1,5 +1,6 @@
 # including External Documentation Object Example
 openapi: 3.2.0
+$self: https://example.com/openapi
 info:
   title: Example Pet Store App
   summary: A pet store manager.

tests/schema/pass/parameter-object-examples.yaml

@@ -51,4 +51,18 @@ paths:
                 lat:
                   type: number
                 long:
-                  type: number
+                  type: number
+  /user:
+    parameters:
+      - in: querystring
+        name: json
+        content:
+          application/json:
+            schema:
+              # Allow an arbitrary JSON object to keep
+              # the example simple
+              type: object
+            example: {
+              "numbers": [1, 2],
+              "flag": null
+            }

tests/schema/pass/response-object-examples.yaml

@@ -5,6 +5,7 @@ info:
 components:
   responses:
     complex-object-array:
+      summary: Complex object array
       description: A complex object array response
       content:
         application/json: