splitting out tests into unit and integration/e2e

[ialarmedalien]

moving unit tests out to be under tests/cdm_data_loaders/*

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.61%. Comparing base (c01480f) to head (4409590).
⚠️ Report is 30 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff              @@
##           develop     #235       +/-   ##
============================================
+ Coverage    68.57%   91.61%   +23.03%     
============================================
  Files           73       61       -12     
  Lines         4462     4151      -311     
============================================
+ Hits          3060     3803      +743     
+ Misses        1402      348     -1054     

see 5 files with indirect coverage changes

---

Continue to review full report in Codecov by Harness.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update eeed07d...4409590. Read the comment docs.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.