fix flaky test testFormatOfBigDecimal

Author: xinying7

modules/swagger-core/src/test/java/io/swagger/v3/core/converting/NumericFormatTest.java

@@ -70,9 +70,9 @@ public void testFormatOfBigDecimal() {
         final Map<String, Schema> models = ModelConverters.getInstance().readAll(ModelWithoutScientificFields.class);
         assertEquals(models.size(), 1);
 
-        String json = Json.pretty(models);
+        String json1 = Json.pretty(models);
 
-        assertEquals(normalizeLineEnds(json),
+        String json2 = 
                 "{\n" +
                         "  \"ModelWithoutScientificFields\" : {\n" +
                         "    \"type\" : \"object\",\n" +
@@ -86,7 +86,11 @@ public void testFormatOfBigDecimal() {
                         "      }\n" +
                         "    }\n" +
                         "  }\n" +
-                        "}");
+                        "}";
+        JSONObject jsonObj1 = new JSONObject(json1);
+        JSONObject jsonObj2 = new JSONObject(json2);
+
+        JSONAssert.assertEquals(jsonObj1, jsonObj2, true);
 
     }