Keep the `test` module

[icemac]

Besides some other removals #302 removed the test module to reduce the image size.

The zodbpickle project uses the test module in its own tests.
In zopefoundation/zodbpickle#63 the manylinux2014_aarch64 image is used to run the tests before building the wheels.

Is there a possibility to get the test module back into the image – either by not removing it or by adding it back afterwards?

[mayeut]

Thanks for the report.
The test module was removed way before #302 in 265756e.
I'll check what this would add it terms of size with the newer images.

[icemac]

@mayeut Thank you for clarifying the point of removal.
Do you have any news regarding the image sizes?

[mayeut]

This would add 40MB uncompressed (on manylinux2014 x86_64) so that does seem reasonable.
I will create a PR to suppress the removal of test modules.

[icemac]

Thank you very much for resolving this issue. It helped a lot for zodbpickle as its tests are now green.