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This should make pylint happier

pylint recently stopped autoloading untrusted c extensions. Lets whitelist lxml

Fixes warnings with newer versions of urllib3 (and possible man in the middle attacks)

This requires that /Microsoft.Management.Odata.svc is no longer part of the baseurl
passed to the constructor. For backwards compatibility we strip it away for now

This allows a significant speedup of for instance getting VMs by MAC address

Create a session in the requests library for each odata client and use that for requests