This patch replaces calls to get_dev_property() by calls to
get_dev_property_by_uuid() in XenAPI.py and fixes the implementation
of get_dev_property_by_uuid.
I am adding a test case to the xapi grouptests to verify the fixes.
There's a FIXME note in the test case which should be looked at.
Signed-off-by: Stefan Berger <stefanb@us.ibm.com>
