JDK 9 RFR of JDK-8069255: Suppress deprecation warnings in jdk.rmic module

[Amy Lu]

Please review these changes to address a few stray deprecation warnings 
in the jdk.rmic module:

    JDK-8069255: Suppress deprecation warnings in jdk.rmic module
http://cr.openjdk.java.net/~amlu/8069255/webrev.00/
I also need a sponsor for this.

Thanks,
Amy