fixing flaky test serializeDoubleProperty

Author: xinying7

modules/swagger-core/src/test/java/io/swagger/v3/core/serialization/properties/PropertySerializationTest.java

@@ -13,6 +13,8 @@
 import io.swagger.v3.oas.models.media.Schema;
 import io.swagger.v3.oas.models.media.StringSchema;
 import org.testng.annotations.Test;
+import org.json.JSONObject;
+import org.skyscreamer.jsonassert.JSONAssert;
 
 import java.io.IOException;
 import java.math.BigDecimal;
@@ -85,8 +87,12 @@ public void serializeDoubleProperty() throws IOException {
         final NumberSchema p = new NumberSchema()
                 ._default(new BigDecimal("3.14159"));
         p.format("double");
-        final String json = "{\"type\":\"number\",\"format\":\"double\",\"default\":3.14159}";
-        assertEquals(m.writeValueAsString(p), json);
+        final String json1 = "{\"type\":\"number\",\"format\":\"double\",\"default\":3.14159}";
+        String json2 = m.writeValueAsString(p);
+        JSONObject jsonObj1 = new JSONObject(json1);
+        JSONObject jsonObj2 = new JSONObject(json2);
+
+        JSONAssert.assertEquals(jsonObj1, jsonObj2, true);
     }
 
     @Test(description = "it should deserialize a DoubleProperty")