[CI] Tests aren't being mocked correctly on CI reruns

[derekbekoe]

Sometimes, the source tests will fail due to 'az login' even though the recordings are correct.
This could possibly be due to the change in folder structure for recordings in Azure/azure-cli.
See also https://github.com/Azure/azure-cli/blob/dev/src/azure-cli-testsdk/azure/cli/testsdk/patches.py#L38