Add pytest suite for airflow processor

[akchinSTC]

See original PR #490 for more details

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[akchinSTC]

depends and based on #1316

[kevin-bates]

Thanks for putting this together. I just had a comment on the fixture names.

Also, there's a typo in the test filename: test_airlfow_processory.py

[ptitzler]

Will a github method test be added separately?

[akchinSTC]

@ptitzler -yes, will add tests for the git utils, but can go separately in another PR

[lresende]

@ptitzler and @kevin-bates It seems that you guys have been reviewing this, so I will wait for your final approvals before merging.

[ptitzler]

LGTM

[kevin-bates]

Could you add a comment indicating how this hash value is computed so folks making changes know what to do?

Frankly. I'd prefer we validate the export w/o this dependency, perhaps by looking for expected values in the output python file - or things like that. This hash stuff has proven to be quite fragile and was abandoned in kfp-notebook.

[akchinSTC]

+1 abandoning the hash stuff. Ill refactor to verify via expected values

[akchinSTC]

Im working through parsing the generated airflow DAG file. Will have an updated PR no later than EOD today. Attempted to use the ast lib to parse but that felt heavy.

[kevin-bates]

LGTM - took tests for a spin - all good. Thanks for removing the hash check - this will be much more sustainable.