When using OOTB CFN Test is broken with 'Tags' attribute on generated class

[carpnick]

Assuming same steps in #247, using the workaround to get by the current cryptography issue.

After trying to run one test cfn test -- -k contract_create_delete, it fails with:

Traceback (most recent call last):
  File "/var/task/cloudformation_cli_python_lib/resource.py", line 165, in _cast_resource_request
    return UnmodelledRequest(
  File "/var/task/cloudformation_cli_python_lib/utils.py", line 156, in to_modelled
    desiredResourceState=model_cls._deserialize(self.desiredResourceState),
  File "/var/task/dd_dd_dd/models.py", line 74, in _deserialize
    Tags=set_or_none(json_data.get("Tags")),
  File "/var/task/dd_dd_dd/models.py", line 30, in set_or_none
    return set(value)
TypeError: unhashable type: 'dict'

Root cause and fix:

• The default JSON makes Tags a list/array of Tag object ("#/definitions/Tag"). A tag object then has a key and value attribute. This is not hashable
• Fix(probably) change this line to a frozen set: return frozenset(value)
  • Also same change for hooks?
  • Maybe this one too.