Fix #6166 by adding @Deprecated annotations in Java jersey2, okhttp-gson, resteasy libraries (#6801)

samples/client/petstore/java/feign/src/main/java/io/swagger/client/api/FakeApi.java

@@ -181,6 +181,18 @@ public interface FakeApi extends ApiClient.Api {
     }
   }
 
+  /**
+   * test inline additionalProperties
+   * 
+    * @param param request body (required)
+   */
+  @RequestLine("POST /fake/inline-additionalProperties")
+  @Headers({
+    "Content-Type: application/json",
+    "Accept: application/json",
+  })
+  void testInlineAdditionalProperties(Object param);
+
   /**
    * test json serialization of form data
    *