Bump psutil from 1.2.1 to 5.6.6

Bumps [psutil](https://github.com/giampaolo/psutil) from 1.2.1 to 5.6.6.
- [Release notes](https://github.com/giampaolo/psutil/releases)
- [Changelog](https://github.com/giampaolo/psutil/blob/master/HISTORY.rst)
- [Commits](giampaolo/psutil@release-1.2.1...release-5.6.6)

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -13,7 +13,7 @@ pystache==0.5.4
 # we are using distutils2 only for the version library since verlib doesn't have a license.
 distutils2==1.0a4
 httplib2>=0.9
-psutil==1.2.1
+psutil==5.6.6
 google-api-python-client==1.2
 
 azure-mgmt-compute==1.0.0