Fixed cpuuse tag on VM

CPU usage was calculated without taking SMP VM into account.

cloudcontrol/node/hypervisor/domains/vm_tags.py

@@ -101,7 +101,7 @@ def cpuuse(dom):
     dom.cpu_stats = (dom.hypervisor.handler.main.evloop.now(), cpu_time)
     # calculate CPU percentage, code is from virt-manager in domain.py:1210
     return '%.2f' % max(0., min(100., ((cpu_time - old_cpu_stats[1]) * 100.) / (
-        (dom.cpu_stats[0] - old_cpu_stats[0]) * 1000. * 1000. * 1000.)))
+        (dom.cpu_stats[0] - old_cpu_stats[0]) * 1000. * 1000. * 1000.) / vcpu))
 
 
 @_vir_tag