Describe the bug:
The test sute Validate sources in definition.yaml files in generate.tests.ts makes calls to remote git repositories to download artifacts.

Some folks who build and test the CLI may not have internet access and these tests will fail. For instance some may want to compile and test the CLI in a closed environment.

To Reproduce:
Run yarn test with no internet access.

Expected behavior:
Unit tests should mock out external dependencies

Does this require updates to documentation?:
No