Review request for JMC-6470: Use the JVM on the path by default for the RCP version of JMC on all platforms

[Marcus Hirt]

Hi all,

Please review this fix to use the JVM on the path by default for
the RCP version of JMC on all platforms.

Jira:   https://bugs.openjdk.java.net/browse/JMC-6470
Webrev: http://cr.openjdk.java.net/~hirt/JMC-6470/webrev.0/

Kind regards,
Marcus