adding more configuration around shard names and restconf port

- added ability to provide specific port numbers for each controllers
  restconf endpoint

- added ability to selectively ignore some shards.  specifically, I
  didn't want to look at the toaster shard when giving a demo

Change-Id: Ia7186193d186e34ba7963741ac54902d9619d34f
Signed-off-by: Jamo Luhrsen <jluhrsen@redhat.com>