CircleCI's 'Rerun failed tests' feature passes test identifiers from the
JUnit XML classname attribute (dot notation, e.g.
'tests.local_testing.test_router') via stdin. pytest receives these paths
and collects 0 items, causing the rerun to exit 123 with no tests run.
Add an awk preprocessor before xargs that detects dot-notation module
paths and converts them to file paths (tests/local_testing/test_router.py).
File paths already containing '.py' are passed through unchanged.
Applied to all three jobs using the 'circleci tests run' + 'xargs pytest'
pattern: local_testing_part1, local_testing_part2, and the router test job.
ed0a965208