ThunderbirdComponentResources create namespace pollution in project

[ryanjjung]

When you run the finish method of a ThunderbirdComponentResource ("TCR", to save my fingers), it blindly adds the resources to the project's resources dict using the name of the resource as a key. If you use a TCR that contains another TCR (like the way the RDS module creates secrets using the Secrets module), then the inner/nested TCR's resources still get added to the top level of project.resources. This breaks the nested structure, pollutes the top level's namespace, and leads to resources being discovered in duplicate during the flattening process later. This doesn't lead to actual problems, as the duplicates are removed by a set typecasting, but it makes debugging anything in the monitoring code very messy.