Revert: Move QueueMember API into middleware

After discussion with Juggie, the majority of this configuraiton does
belong in the database.  For example, this will allow a supervisor to
setup Queue assignments for Agents.

Change-Id: Ic65ea7c71723afeafe547be5661e80e587bd5078
Signed-off-by: Paul Belanger <paul.belanger@polybeacon.com>