Added mock tuskar driver

This patch allows you to simulate the creation and deletion of
a tuskar plan, allowing us to test workflows while the tuskar
API is under development.

It also removes the deployment count validation, as it causes
problems in the new api and is not likely to be used as is.

Change-Id: I20083021e0b55b5de234af68b89786e793ab8f09
Merge "Added mock tuskar driver"