Can't register nodes with oVirt driver

[Derek Higgins]

Nodes being registered with the oVirt driver can hit the following error if a unicode string is passed to ironic (not necessarily containing multibyte characters)

2018-03-29 07:00:58.148 3756 ERROR ironic.conductor.manager [req-c9720ee5-fe91-4c28-b818-c3edca18d7fd 7269b7f74ab34dad801bcf76eec969df b12d981054544dfe9fcbbfea8a0669f5 - default default] Failed to get power state for node ed8eda70-3a8e-4096-bc73-341f419ba164. Error: invalid arguments to setopt

The problem is that it accepts strings, not unicode objects.

python-pycurl-7.19.0-19.el7.x86_64

>>> c = pycurl.Curl()
>>> c.setopt(pycurl.URL, "http://a.com")
>>> c.setopt(pycurl.URL, u"http://a.com")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: invalid arguments to setopt

[Derek Higgins (derekh)]

In ./ironic_staging_drivers/ovirt/ovirt.py:_getvm
Wrapping url in str(url) fixes the problem assuming the VM name doesn't contain multibyte characters

[Derek Higgins (derekh)]

Fix submitted here
https://review.openstack.org/#/c/559353/