fence_vmware_soap on RHEL fails with the error "Current license or ESXi version prohibits execution of the requested operation"

Issue

• When trying to use the fence_vmware_soap agent, the following traceback is produced:

# fence_vmware_soap -z -l root -p <pass> -a <ip address> -o reboot -U <uuid>
No handlers could be found for logger "suds.client"
Traceback (most recent call last):
  File "/usr/sbin/fence_vmware_soap", line 204, in <module>
    main()
  File "/usr/sbin/fence_vmware_soap", line 191, in main
    result = fence_action(conn, options, set_power_status, get_power_status, get_power_status)
  File "/usr/share/fence/fencing.py", line 836, in fence_action
    set_power_fn(tn, options)
  File "/usr/sbin/fence_vmware_soap", line 158, in set_power_status
    conn.service.PowerOffVM_Task(mo_machine)
  File "/usr/lib/python2.6/site-packages/suds/client.py", line 542, in __call__
    return client.invoke(args, kwargs)
  File "/usr/lib/python2.6/site-packages/suds/client.py", line 602, in invoke
    result = self.send(soapenv)
  File "/usr/lib/python2.6/site-packages/suds/client.py", line 657, in send
    result = self.failed(binding, e)
  File "/usr/lib/python2.6/site-packages/suds/client.py", line 712, in failed
    r, p = binding.get_fault(reply)
  File "/usr/lib/python2.6/site-packages/suds/bindings/binding.py", line 265, in get_fault
    raise WebFault(p, faultroot)
suds.WebFault: Server raised fault: 'Current license or ESXi version prohibits execution of the requested operation.'