RFR (not as big as it looks) 8184994: Add Dictionary size logging and jcmd

[coleen.phillimore at oracle.com]

Summary: added dcmd for printing system dictionary like the stringtable 
and symboltable and making print functions go to outputstream rather 
than tty

Tested with tier1 on linux x64, and runThese with jcmd to query 
systemdictionaries (lots of class loaders).

open webrev at http://cr.openjdk.java.net/~coleenp/8184994.01/webrev
bug link https://bugs.openjdk.java.net/browse/JDK-8184994

Thanks,
Coleen