virt-who fails with error: Invalid XML file returned from RHEV-M: 'ascii' codec can't encode characters in position 2548-2549: ordinal not in range(128)

Issue

• When virt-who communicates with the hypervisor's API, it returns errors due to non-ASCII characters:

2017-03-27 17:20:05,292 [virtwho.env_cmdline ERROR] RhevM-2(15497):MainThread @virt.py:run:375 - Virt backend 'env/cmdline' fails with error: Invalid XML file returned from RHEV-M: 'ascii' codec can't encode characters in position 2548-2549: ordinal not in range(128)
2017-03-27 17:20:05,292 [virtwho.env_cmdline INFO] RhevM-2(15497):MainThread @virt.py:run:392 - Waiting 60 seconds before retrying backend 'env/cmdline'
2017-03-27 17:20:49,241 [virtwho.rhevm DEBUG] RhevM-1(15496):MainThread @rhevm.py:get_xml:100 - Invalid xml file: <?xml version="1.0" encoding="UTF-8" standalone="yes"?>