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_sdk.c

@@ -3600,6 +3600,12 @@ prlsdkAttachDevice(vzDriverPtr driver,
         return -1;
     }
 
+    if (prlsdkUpdateDomain(driver, dom) < 0) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                        _("Failed to save new config"));
+        return -1;
+    }
+
     job = PrlVm_CommitEx(privdom->sdkdom, PVCF_DETACH_HDD_BUNDLE);
     if (PRL_FAILED(waitDomainJob(job, dom)))
         return -1;
@@ -3667,6 +3673,12 @@ prlsdkDetachDevice(vzDriverPtr driver,
         goto cleanup;
     }
 
+    if (prlsdkUpdateDomain(driver, dom) < 0) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                        _("Failed to save new config"));
+        goto cleanup;
+    }
+
     job = PrlVm_CommitEx(privdom->sdkdom, PVCF_DETACH_HDD_BUNDLE);
     if (PRL_FAILED(waitDomainJob(job, dom)))
         goto cleanup;