RFR: JDK-8232281, , jpackage is not always reporting an error when no main class specified

[Alexey Semenyuk]

Looks good.

- Alexey

On 10/18/2019 10:53 AM, 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 fixes the case where using runtime-image prevented checking for 
> no main class being specified.
>
> [1] https://bugs.openjdk.java.net/browse/JDK-8232281
>
> [2] http://cr.openjdk.java.net/~herrick/8232281/webrev.01/index.html
>
> /Andy
>