test_heuristics fails on Docker image

[pvelasco]

Summary

When trying to run the unit tests inside the official Docker image, the test_reproin_largely_smoke fails because the hexsha changes when calling with --overwrite.

Platform details:

Choose one:

• Local environment

• Container:

nipy/heudiconv:0.9.0, but it also fails since 0.6.0

• Heudiconv version:

0.9.0, all the way back to 0.6.0

To replicate failed test:

docker run -it --rm --name heudiconv_tests --entrypoint /bin/bash   nipy/heudiconv:0.9.0

Then, inside the container, run:

git config --global user.email "test@travis.land"
git config --global user.name "Travis Almighty"
pytest -s -v -k 'test_reproin_largely_smoke' /src/heudiconv/

Note: it also fails without configuring git.