jmx-dev RFR: 8010285 Enforce the requirement of Management Interfaces being public

[Jaroslav Bachorik]

Please, review the final version of the changes:
http://cr.openjdk.java.net/~jbachorik/8010285/webrev.07

It addresses all the concerns raised during the CCC process.

I will need at least one official OpenJDK reviewer for the integration.

Thanks,

-JB-