Create more tests for unity

[jlongtine]

• https://github.com/awslabs/aws-cloudformation-templates
• https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/cfn-sample-templates.html
• https://aws.amazon.com/cloudformation/resources/templates/
• generate a large set of instances for an stx-like tree structure.
  • Build a set of stacks with applications, rds, etc.
  • run cue export from a number of different levels in the tree
• Build a "full" disjunction version of the module with a set of tests that exercise it (these should be painfully slow, but improve immensely with structure sharing and discriminator fields)