RFR: JDK-8234402: revert change that stopped providing JPackageToolProvider

[Alexander Matveev]

Looks good.

On 11/19/19 4:00 PM, Andy Herrick wrote:
> Please review the jpackage fix for bug [1] at [2].
>
> This is a fix for the JDK-8200758-branch branch of the open sandbox 
> repository (jpackage).
>
> This change restores JPackageToolProvider and gets rid of the 
> temporary factory class.
>
> [1] https://bugs.openjdk.java.net/browse/JDK-8234402
>
> [2] http://cr.openjdk.java.net/~herrick/8234402/webrev.02/
>
> /Andy
>