Fix missing import in allOf query parameters (#14408)

* add test for allOf in query parameter

* fix missing import in allof query parameter

* update samples

* update samples

samples/client/echo_api/java/feign-gson/api/openapi.yaml

@@ -147,6 +147,29 @@ paths:
       tags:
       - query
       x-accepts: text/plain
+  /query/style_deepObject/explode_true/object/allOf:
+    get:
+      description: Test query parameter(s)
+      operationId: test/query/style_deepObject/explode_true/object/allOf
+      parameters:
+      - explode: true
+        in: query
+        name: query_object
+        required: false
+        schema:
+          $ref: '#/components/schemas/BirdAndCategory'
+        style: deepObject
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test query parameter(s)
+      tags:
+      - query
+      x-accepts: text/plain
   /echo/body/Pet:
     post:
       description: Test body parameter(s)
@@ -255,6 +278,17 @@ components:
       type: object
       xml:
         name: pet
+    Bird:
+      properties:
+        size:
+          type: string
+        color:
+          type: string
+      type: object
+    BirdAndCategory:
+      allOf:
+      - $ref: '#/components/schemas/Bird'
+      - $ref: '#/components/schemas/Category'
     test_query_style_form_explode_true_array_string_query_object_parameter:
       properties:
         values: