Add test_connectivity and VCRPY

[edthedev]

Context

Our primary use case is our SOAR app, which expects a test connectivity feature. It makes the most sense to provide that here, in this library.

Tasks

• [x] implement test_connectivity (maybe just a call to _get_access_token and validate we got a token?)
• [x] make test_connectivity return true/false
• [x] stretch: record a VCR cassette for success
• [ ] stretch: modify a VCR cassette to simulate and test auth failure

[tzturner]

We've reached the point where we need to scrub cassettes of credentials info. Next step is to implement a VCR cleaner.

Yesterday, two .yaml files were checked in containing ClearPass credentials. We informed security@illinois.edu, set the repo to private, and deleted the two .yaml files in question.

[tzturner]

Cleaner is partially implemented. We are having trouble cleaning the token from the response.

It appears that in our cassette method in conftest.py, our serializer (cleanyaml') is not being used, despite being registered as a cleaner. Instead, the serializeryaml` is being used.

yaml_cleaner = CleanYAMLSerializer()
    my_vcr.register_serializer("cleanyaml", yaml_cleaner)
    # TODO: Register cleaner functions here:
    yaml_cleaner.register_cleaner(clean_auth)

    breakpoint()
    with my_vcr.use_cassette(f'{request.function.__name__}.yaml',
                             seralizer='cleanyaml') as tape:

(Pdb) my_vcr.serializers
{'yaml': <module 'vcr.serializers.yamlserializer' from '/home/tzturner/projects/clearpass-api/venv/lib64/python3.9/site-packages/vcr/serializers/yamlserializer.py'>,
'json': <module 'vcr.serializers.jsonserializer' from '/home/tzturner/projects/clearpass-api/venv/lib64/python3.9/site-packages/vcr/serializers/jsonserializer.py'>,
'cleanyaml': <vcr_cleaner.CleanYAMLSerializer object at 0x7fa012124160>}
(Pdb) my_vcr.serializer
'yaml'

[tzturner]

The problem above was due to a spelling error. serializer is not spelled seralizer.