When Controller.add_model is called it returns a model, this model
should be disconnected from otherwise stack-traces like the one
reported in issue #135 occur.
Python-libjuju does not update the local cache of juju models on model
create. If no juju switch command or juju models command is run juju
will report model not found.
Issue is being tracked by
https://github.com/juju/python-libjuju/issues/267
Add a juju models command to update the local cache and make the new
model available to the juju binary.
Recently functions were added to zaza.model for adding and removing
models. These duplicated existing functions in zaza.controller.
Given these functions act against the controller, zaza.controller
feels like the correct location. In addition the implementations in
zaza.controller correctly handle disconnects which the new ones
did not.
This PR removes the duplicates and points any existing references
from zaza.model to zaza.controller. Finally, docstrings were added
and documentation links.
