RFR (S) 8130072: Add a flag to print out statistics for both system dictionary and shared dictionary

[coleen.phillimore at oracle.com]

Summary: Include Shared Dictionary printing when printing system 
dictionaries in jcmd

Also already included in -XX:+PrintSystemDictionaryAtExit. -Xshare:dump 
also has already added for -XX:+PrintSystemDictionaryAtExit.

Tested with runThese in background and running jcmds, also see added test.

open webrev at http://cr.openjdk.java.net/~coleenp/8130072.01/webrev
bug link https://bugs.openjdk.java.net/browse/JDK-8130072

Thanks,
Coleen