encoding property in maven plugin is never set correctly to charset property of the checkstyle itself.

1. In the pom.xml i set property <encoding>:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-checkstyle-plugin</artifactId>
    <version>2.6</version>
    <configuration>
        <encoding>UTF-8</encoding>
    </configuration>
</plugin>

2. When i run the checkstyle (mvn checkstyle:checkstyle) this property is not set to "charset" attribute.

3. I noticed that this functionality works for version 2.2. However it does not work for versions 2.4 and above. I think that this functionality does not work after some refactoring is done and this functionality is moved in org.apache.maven.plugin.checkstyle.DefaultCheckstyleExecutor -> "public Configuration getConfiguration( CheckstyleExecutorRequest request )".
The problem is that in this method the developer tries to find the Checker module and to set its "charset" attribute as a child of the "config" object. However the "config" object it the Checker module itself.
Fix is simple - just take out adding of "charset" attribute value from the for cycle.
I will attach the class with the new code and difference between the new and old code.

I hope this bug can be fixed soon.
Thanks!

Best regards,
Svetlomira