Update data-class template to allow inheritance when a parent module is defined

Author: macisamuele

gradle-plugin/plugin/src/main/resources/kotlin/data_class.mustache

@@ -1,8 +1,8 @@
 /**{{#description}}
  * {{{description}}}{{/description}}
-{{#vars}}
+{{#allVars}}
  * @property {{{name}}}{{#description}} {{description}}{{/description}}
-{{/vars}}
+{{/allVars}}
  */
 @JsonClass(generateAdapter = true)
 {{#hasVars}}data {{/hasVars}}class {{classname}}{{#hasVars}}(
@@ -11,7 +11,7 @@
 {{/-last}}{{/requiredVars}}{{#hasRequired}}{{#hasOptional}},
 {{/hasOptional}}{{/hasRequired}}{{#optionalVars}}{{>data_class_opt_var}}{{^-last}},
 {{/-last}}{{/optionalVars}}
-){{#hasEnums}} {
+){{#parent}} : {{parent}}({{#parentVars}}{{name}} = {{name}}{{#hasMore}}, {{/hasMore}}{{/parentVars}}){{/parent}}{{#hasEnums}} {
 {{#vars}}
 {{#isEnum}}
     /**{{#description}}

samples/junit-tests/src/main/java/com/yelp/codegen/generatecodesamples/models/NestedAdditionalPropertiesCustomDescription.kt

@@ -6,4 +6,9 @@
 
 package com.yelp.codegen.generatecodesamples.models
 
-typealias NestedAdditionalPropertiesCustomDescription = NestedAdditionalProperties
+import com.squareup.moshi.JsonClass
+
+/**
+ */
+@JsonClass(generateAdapter = true)
+class NestedAdditionalPropertiesCustomDescription