RFR: JMC-6124: Defaulting to OpenJDK 11 development launchers, and moving the old Oracle JDK 8 specific launchers

[Marcus Hirt]

Hi all,

Please review this fix to use OpenJDK 11 development launchers by default,
and providing a separate set of Oracle JDK launchers.

Jira:  https://bugs.openjdk.java.net/browse/JMC-6214
Patch: http://cr.openjdk.java.net/~hirt/JMC-6214/launcherdiff.txt

Kind regards,
Marcus