VMware: bug fix for VM rescue when config drive is configured

The addition of the config drive feature broke the VM rescue. The
cause of the problem was setting the instance UUID to the name of
the rescue instance. This must be a UUID! The solution
is to pass the instance name to the spawn method instead of writing
this on the instance UUID.

Closes-bug: #1247427

Conflicts:

	nova/virt/vmwareapi/vmops.py

Change-Id: Ia8494b0c8099753b666bda18a19c4c9a3f764616
(cherry picked from commit 88861df2b95a9c66a1a9d1969ad9e560786bb848)