Add more raft config knobs
Refactor peer handles to be consistent with other handlers
Allow inspect to work across controllers
Add config and clusterconfig inspect support
* Added raft leave and raft list members
* reordered agent raft leave to only check address if is is not found
* instead of adding second raft ctrl, just cast the dispatcher
* Router cert handling fix
* Always start with empty bolt db, so raft journal can be applied
cleanly
* Allow looking up raft member ids, so you only need to provide addr
* Report metrics to all controllers. Fixesopenziti/fabric#525
Paul Lorenz