An upper-constraints update to psutil caused IPA to start using psutil
5.0.1. We had a hard-coded assumption that psutil would be major version
1 or 2. This allows us to use the updated psutil and attempts to simply
fail gracefully if an unrecognized psutil version is used.
Change-Id: Ibe072440159561b34a29b478d955876e5fb7f103
Closes-Bug: 1659137