Issue

• Emails similar to the following are sent by the cron deamon:

  Subject: Cron <root@gertrude> python /usr/share/rhn/virtualization/poller.py
  Content-Type: text/plain; charset=UTF-8
  Auto-Submitted: auto-generated
  X-Cron-Env: <SHELL=/bin/sh>
  X-Cron-Env: <HOME=/root>
  X-Cron-Env: <PATH=/usr/bin:/bin>
  X-Cron-Env: <LOGNAME=root>
  X-Cron-Env: <USER=root>
  
  Traceback (most recent call last):
  File "/usr/share/rhn/virtualization/poller.py", line 189, in ?
  domain_list = poll_hypervisor()
  File "/usr/share/rhn/virtualization/poller.py", line 63, in poll_hypervisor
  conn = libvirt.open(None)
  File "/usr/lib/python2.4/site-packages/libvirt.py", line 39, in open
  if ret is None:raise libvirtError('virConnectOpen() failed')
  libvirt.libvirtError: virConnectOpen() failed