[issue-9918] set isNumeric for int32 types

Author: mitchnull

modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java

@@ -1705,6 +1705,7 @@ public CodegenProperty fromProperty(String name, Property p) {
         if (p instanceof IntegerProperty) {
             IntegerProperty sp = (IntegerProperty) p;
             property.isInteger = true;
+            property.isNumeric = true;
             if (sp.getEnum() != null) {
                 List<Integer> _enum = sp.getEnum();
                 property._enum = new ArrayList<String>();