Fix VM_metrics.get_vcpus_utilisation.

Fix is due to Ingard Mevåg <ingard.mevag@stud.iu.hio.no>.

Signed-off-by: Ewan Mellor <ewan@xensource.com>

tools/python/xen/xend/XendAPI.py

@@ -1550,7 +1550,7 @@ class XendAPI(object):
         return xen_api_success(self._VM_metrics_get(ref).get_vcpus_number())
 
     def VM_metrics_get_vcpus_utilisation(self, _, ref):
-        return xen_api_success(self._VM_metrics_get(ref).get_metrics_get_vcpus_utilisation())
+        return xen_api_success(self._VM_metrics_get(ref).get_vcpus_utilisation())
 
     # Xen API: Class VBD
     # ----------------------------------------------------------------