fix mustache template

Author: thorstenhirsch

modules/openapi-generator/src/main/resources/Java/libraries/native/pojo.mustache

@@ -272,7 +272,7 @@ public class {{classname}} {{#parent}}extends {{{.}}} {{/parent}}{{#vendorExtens
 {{>libraries/native/additional_properties}}
 
   {{#parent}}
-  {{#allVars}}
+  {{#readWriteVars}}
   {{#isOverridden}}
   @Override
   public {{classname}} {{name}}({{>nullable_var_annotations}} {{{datatypeWithEnum}}} {{name}}) {
@@ -286,7 +286,7 @@ public class {{classname}} {{#parent}}extends {{{.}}} {{/parent}}{{#vendorExtens
   }
 
   {{/isOverridden}}
-  {{/allVars}}
+  {{/readWriteVars}}
   {{/parent}}
   /**
    * Return true if this {{name}} object is equal to o.