Move cloud.py to a module init. Move policy with it. Update related unit tests. Also adds a patch to state machine test to prevent randomness in mock from failing test.
The implementation here is meant to wrap a library of JSON policy
documents. Policies should be added to directories corresponding to
where they will be defined (portfolio, application, environment).
Functionality for parsing portfolio policy definitions is included. When
the policies need to be defined on a management group, the
AzureCloudProvider can iterate the appropriate tier of the policy
manager and add those definitions.
