Revert "Revert "Enforce filename harmonisation. Improve unittest""

[bpasquer]

Reverts aodn/python-aodndata#373

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.01% :warning:

Comparison is base (64888c7) 86.32% compared to head (44d75c2) 86.32%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #382 +/- ## ========================================== - Coverage 86.32% 86.32% -0.01% ========================================== Files 54 54 Lines 3760 3765 +5 Branches 601 600 -1 ========================================== + Hits 3246 3250 +4 - Misses 358 360 +2 + Partials 156 155 -1 ``` | [Files Changed](https://app.codecov.io/gh/aodn/python-aodndata/pull/382?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aodn) | Coverage Δ | | |---|---|---| | [aodndata/aodn\_wave/handler.py](https://app.codecov.io/gh/aodn/python-aodndata/pull/382?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aodn#diff-YW9kbmRhdGEvYW9kbl93YXZlL2hhbmRsZXIucHk=) | `85.88% <100.00%> (+3.38%)` | :arrow_up: | ... and [2 files with indirect coverage changes](https://app.codecov.io/gh/aodn/python-aodndata/pull/382/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aodn)

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