RFR 8073596 : Add jdk.management.cmm in boot.modules that needs sun.management.spi be exported to it

[Brent Christian]

Hi,

Please review a small update to the module config files for a new 
jdk.management.cmm module.

Webrev: http://cr.openjdk.java.net/~bchristi/8073596/webrev/
Bug: https://bugs.openjdk.java.net/browse/JDK-8073596

I also found a needed hook missing from Gensrc-java.management.gmk

FWIW, Erik Joelsson and Magnus Ihse Bursie have already seen and 
approved this build change.

(Note that I am not on either of these aliases, so please include me 
directly in any responses. :)

Thanks,
-Brent