Download: Bugfix for AttributeError: 'ContainerError' object has no attribute 'absoluteURI'

[MatthiasZepper]

Unrelated to the bugfix, I have also made a small change to the documentation, since I recently had some odd issues with that one myself.

PR checklist

• This comment contains a description of changes (with reason)
• CHANGELOG.md is updated
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated

[mashehu]

Do you mind writing a test for this?

[MatthiasZepper]

Do you mind writing a test for this?

Frankly? Yes.

There is already a test for the ContainerError that I wrote, but it simply is a very fragile piece of code, because it depends on non-standard responses from different container registries and has to deal with whatever weirdly specified container URIs that somehow made it through PR review and linting and were eventually released in a pipeline revision.

Feel free to add more test cases there, but on macOS the test does not run locally due to the lack of Singularity.

[mashehu]

test_component tests are currently failing due to transitioning to aws in #2550. wil merge anyway