unit test updates

[danwinship]

1. unskip Test_proxyConfig
2. add missing SessionAffinity tests

/assign @aojea

[k8s-ci-robot]

@danwinship: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cloud-provider-kind-conformance-parallel-ipv6	d356b39	link	false	/test pull-cloud-provider-kind-conformance-parallel-ipv6
pull-cloud-provider-kind-conformance-parallel-ga-only	d356b39	link	false	/test pull-cloud-provider-kind-conformance-parallel-ga-only

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[aojea]

Thank you so much
/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aojea, danwinship

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