fixed flaky test deserializeIntegerProperty

Author: xinying7

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

@@ -140,12 +140,15 @@ public void serializeIntegerProperty() throws IOException {
 
     @Test(description = "it should deserialize a IntegerProperty")
     public void deserializeIntegerProperty() throws IOException {
-        final String json = "{\"type\":\"integer\",\"format\":\"int32\"}";
-        final Schema p = m.readValue(json, Schema.class);
+        final String json1 = "{\"type\":\"integer\",\"format\":\"int32\"}";
+        final Schema p = m.readValue(json1, Schema.class);
         assertEquals(p.getType(), "integer");
         assertEquals(p.getFormat(), "int32");
         assertEquals(p.getClass(), IntegerSchema.class);
-        assertEquals(m.writeValueAsString(p), json);
+        String json2 = m.writeValueAsString(p);
+        JSONObject jsonObj1 = new JSONObject(json1);
+        JSONObject jsonObj2 = new JSONObject(json2);
+        JSONAssert.assertEquals(jsonObj1, jsonObj2, true);
     }
 
     @Test(description = "it should serialize a LongProperty")