Cordova Plugin default preferences loaded as 'undefined' value inside cordova project.

Scenario
========

Creating a new cordova Plugin.

Setting preferences and default values in different platforms inside plugin.xml file.

Once the plugin is added to the project and built, resultant DEFAULT values aren´t loaded and set to 'undefined'.

PROJECT SAMPLE CODE PROVIDED
============================

Only relevant lines of code are included, everything else has been removed since is automatically generated by cordova.

<?xml version="1.0" encoding="utf-8"?>
<plugin id="cordova-plugin-sampleplugin" version="0.0.4"

xmlns="http://www.phonegap.com/ns/plugins/1.0"
xmlns:android="http://schemas.android.com/apk/res/android">

<name>Plugin</name>
<preference name="SAMPLE_PREF_1" default="value1" />
<preference name="SAMPLE_PREF_2" default="value2" />
<preference name="SAMPLE_PREF_3" default="value3" />

<engines>
<engine name="cordova" version=">=3.4.0" />
</engines>

<asset src="www/SamplePlugin.js" target="js/SamplePlugin.js" />

<platform name="android">

<config-file parent="/*" target="res/xml/config.xml">
<preferences name="com.sample.plugin">
<preference name="samplepref1" value="$SAMPLE_PREF_1" />
<preference name="samplepref2" value="$SAMPLE_PREF_2" />
<preference name="samplepref3" value="$SAMPLE_PREF_3" />
</preferences>
</config-file>
</platform>
</plugin>

Given the following preference configuration and default values PROVIDED

the resultant config.xml file inside res/xml/config.xml (android example) contains all default values set to 'undefined'

<preferences name="com.sample.plugin">
<preference name="samplepref1" value="undefined" />
<preference name="samplepref2" value="undefined" />
<preference name="samplepref3" value="undefined" />
</preferences>