JSON optimization for initial Jolokia list call

[grgrzybek]

@gashcrumb @davsclaus these commits optimize initial Jolokia list call in case there are lots of similar MBeans (like ActiveMQ queues). I created special MBean hawtio:type=security,name=RBACRegistry. hawtio client application detects if it's present and (if true) calls jolokia/exec/thisMBean instead of jolokia/list.

It's especially important with RBAC, where you have (had) to do initial list with maxDepth=8. Without RBAC, initial list call can use maxDepth=2.

Please check if these commits for hawtio v1 could be useful for v2

[tadayosi]

The hawtio-osgi-jmx and hawtio-system parts are already merged to hawtio/hawtio 2.x. The remaining TypeScript parts should be addressed at hawtio/hawtio-jmx#28.