Implementing simple operator API

Setup executable to use wsgiref.simple_server
Simple setup of pecan
Defined controllers that define the API resources
Defined the wsme types that define the resource response and request bodies
Created a handler that is responsible for sending to controller
Added some wsme type tests

Implements: bp/operator-api

Change-Id: I0d91934db47a6e45f0c9ac22089f8689957bd239
Merge branch 'bp/operator-api' of https://github.com/brandonlogan/octavia into bp/operator-api

Squash this commit... Had a merge conflict

Conflicts:
	octavia/tests/unit/db/test_models.py

Change-Id: I39946c0bd1bce33015bda88161f95a93a52e39f7