Update EnumTest.java getValue() with Integer

Author: eric-rolli

samples/server/petstore/jaxrs/jersey2-useTags/src/gen/java/org/openapitools/model/EnumTest.java

@@ -134,7 +134,7 @@ public enum EnumIntegerEnum {
     }
 
     @JsonValue
-    public String getValue() {
+    public Integer getValue() {
       return value;
     }