Update virt-who to 0.31.0-1
    Resolves: #1876927 - virt-who fails to parse output from hypervisor (wpoteat@redhat.com)
    Resolves: #1878136 - Deprecation comment in config file (wpoteat@redhat.com)
    Resolves: #1854829 - rhsm_port and rhsm_password are missing in template.conf
    Resolves: #1878136 - Deprecation warning for environment variables (wpoteat@redhat.com)
    Resolves: #184506 - virt-who should send its version in the User-Agent header
    Resolves: #1806572 - RHEVM API url needs version specified (wpoteat@redhat.com)
    Resolves: #1847792 - [ESX] Virt-who is failed when run with
    Resolves: #1809098 - Convert UUID to big-endian for certain esx hardware versions
    Resolves: #1835132 - support milicpus (piotr.kliczewski@gmail.com)
    Resolves: #1806572 - RHEVM should only use version 4 (wpoteat@redhat.com)
    Resolves: #1461272 - Filter virt-who hosts based on host_parents using wildcard
    Resolves: #1806572 - virt-who using V3 APIs for communication with RHEVM which is