Virt-who issue after upgrade to 0.19-2

Issue

When trying to start the virt-who daemon, the following error is seen in /var/log/rhsm/rhsm.log:

/usr/bin/virt-who[1159]: [INFO] @main.py:158 - No configurations found, using libvirt as backend
/usr/bin/virt-who[1159]: [INFO] @main.py:165 - Using configuration "env/cmdline" ("libvirt" mode)
/usr/bin/virt-who[1159]: [INFO] @main.py:167 - Using reporter_id='host.example.com'
/usr/bin/virt-who[1159]: [INFO] @libvirtd.py:157 - Using libvirt url: ""
/usr/bin/virt-who[1159]: [ERROR] @libvirtd.py:165 - Error in libvirt backend
                                                           libvirtError: no connection driver available for <null>
/usr/bin/virt-who[1159]: [ERROR] @virt.py:390 - Virt backend 'env/cmdline' fails with error: no connection driver available for <null>