vmware: Add more descriptive error message on Find failure
If vmwareDomainLookupByID or vmwareDomainLookupByName fails
to find a vm, let's be a bit more descriptive by providing
the failing id or name in the error message.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>