RFR: JDK-8196736: Refactor HelpWriter and properties

[Kumar Srinivasan]

Hi Jon,

Looks good.

Kumar

> Please review a very simple renaming/refactoring of the code and 
> properties used to generate the Help page, as a precursor to updating 
> the content.
>
> This step does not change the relevant content of the generated page 
> at all.
>
> JBS: https://bugs.openjdk.java.net/browse/JDK-8196736
> Webrev: http://cr.openjdk.java.net/~jjg/8196736/webrev.00/
>
> -- Jon
>
>