Merge pull request swagger-api#1093 from Talend/issue-997

Properties order lost while converting from v2 to v3 swagger-api#997

Author: gracekarina

modules/swagger-parser-v2-converter/src/main/java/io/swagger/v3/parser/converter/SwaggerConverter.java

@@ -71,6 +71,7 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
@@ -921,7 +922,7 @@ private Schema convert(Property schema) {
             result.setExample(schema.getExample());
 
             if ("object".equals(schema.getType()) && (result.getProperties() != null) && (result.getProperties().size() > 0)) {
-                Map<String, Schema> properties = new HashMap<>();
+                Map<String, Schema> properties = new LinkedHashMap<>();
 
                 ((ObjectProperty) schema).getProperties().forEach((k, v) -> properties.put(k, convert(v)));