Sandbox play with additional roles added
This play is no longer required, as it was fixed upstream
Slight refactor to make this more like edxapp and reuse nginx role
Added ability for mongo role to do simple replica set clusters
By default this should keep the role the same.  The only catch with this implementation
is that the ansible mongodb_user module doesn't handle slaves particularly well. So if you
have a cluster than any task that creates a user will succeed on the master and fail on all
slaves.