Review request for JMC-6327: Updating version to 7.1.0

[Marcus Hirt]

Hi all,

Please review this fix to update the versions in the mainline repo.

Jira:   https://bugs.openjdk.java.net/browse/JMC-6327
Webrev: http://cr.openjdk.java.net/~hirt/JMC-6327/webrev.0/

Kind regards,
Marcus