Switch Python Testing Package to Pytest

[micw523]

What is the feature and why do you need it:
Currently we are using pytest to test our clients and nose to generate coverage reports for the base repo. The reports can instead be generated with pytest as shown in here.
Describe the solution you'd like to see:
Use pytest instead of nose to generate code coverage reports.
/good-first-issue
/help

[k8s-ci-robot]

@micw523:
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In response to this:

What is the feature and why do you need it:
Currently we are using pytest to test our clients and nose to generate coverage reports for the base repo. The reports can instead be generated with pytest as shown in here.
Describe the solution you'd like to see:
Use pytest instead of nose to generate code coverage reports.
/good-first-issue
/help

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[palnabarun]

/assign

[vladdoster]

Going to attempt this issue @micw523

[palnabarun]

@vladdoster I am on it already :)