RFR 8214024: Remove the default keytool -keyalg value

[Weijun Wang]

Please review https://bugs.openjdk.java.net/browse/JDK-8234207.

Thanks,
Max

> On Nov 15, 2019, at 4:30 AM, Sean Mullan <sean.mullan at oracle.com> wrote:
> 
> Also, please don't forget to add a Release Note.