vz: fixed race in vzDomainAttach/DettachDevice

While dettaching/attaching device in OpenStack, nova
calls vzDomainDettachDevice twice, because the update of the internal
configuration of the ct comes a bit latter than the update event.
As the result, we suffer from the second call to dettach the same device.
Signed-off-by: NOlga Krishtal <okrishtal@virtuozzo.com>

src/vz/vz_driver.c

@@ -1193,6 +1193,9 @@ static int vzDomainAttachDeviceFlags(virDomainPtr domain, const char *xml,
     if (prlsdkAttachDevice(driver, dom, dev) < 0)
         goto cleanup;
 
+    if (prlsdkUpdateDomain(driver, dom) < 0)
+        goto cleanup;
+
     ret = 0;
  cleanup:
     virDomainDeviceDefFree(dev);
@@ -1245,6 +1248,9 @@ static int vzDomainDetachDeviceFlags(virDomainPtr domain, const char *xml,
     if (prlsdkDetachDevice(driver, dom, dev) < 0)
         goto cleanup;
 
+    if (prlsdkUpdateDomain(driver, dom) < 0)
+        goto cleanup;
+
     ret = 0;
  cleanup:
     virDomainDeviceDefFree(dev);