Updated model yang file to use recommended practices found on wiki, then updated...

Updated model yang file to use recommended practices found on wiki, then updated binding aware code.

ODL wiki recommends
- All lists should be in a container
- The name just after the list should be singular since it is the element name not the list name
- The outer container should be plural

Updated yang file to do the recommended things, then updated code to match the updated yang generated bindings.

Change-Id: Idafb6b3205fa5ca5d99acc56c7c2b19b8eb4200f
Signed-off-by: Ryan Vail <r.vail@cablelabs.com>