False errors by 10x_has_more_than_2_files.adoc

[rays22]

Describe the bug The rule has to take into account both the lane and the process id. i.e. there should be 2-4 files per lane per process, otherwise it produces false errors. Also, give a more informative error message than an array of num_files.

To Reproduce Steps to reproduce the behavior:

1. Use submission 85e72912-9f91-4489-8169-3b43cc65a16a. https://github.com/HumanCellAtlas/hca-data-wrangling/issues/356
2. Hydrate and run a validation test.
3. Check the validation test output for errors.
4. See error

   [ingest_graph_validator.actions.test_action] - ERROR: test [10x_has_more_than_2_files.adoc] failed: non-empty result. [ingest_graph_validator.actions.test_action] - ERROR: result: [{'num_files': 6}, {'num_files': 6}, {'num_files': 6}, {'num_files': 6}, {'num_files': 6}, {'num_files': 6}, {'num_files': 6}, {'num_files': 6}, {'num_files': 6}, {'num_files': 6}, {'num_files': 6}, {'num_files': 6}, ...

Expected behavior No errors for dataset 85e72912-9f91-4489-8169-3b43cc65a16a.

Screenshots NA Desktop (please complete the following information):

• OS: all
• Version: 0.5.4; master#7 commit 5bcb088b1ce3e493c3d22fdb91d2db53345c1b23

[mshadbolt]

I think this needs to account for the lane index in the test in order to be more accurate. As in

• For any process that uses a 10X library,
• group the process by lane index
• then perform check for at least 2 but not more than 4 files

[ESapenaVentura]

This is solved by changing the test to check for only 2+ files, and expecting if we get more than expected (e.g. 5) will be captured by "ensure_lane_index"