运维如果没有获取到cmdid，则使用SN

mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java

@@ -590,8 +590,13 @@ public class MpMasterService extends Service {
 
         logger.warning("Start Mntn report: " + masterUrl + " MntnMode=" + (mMntnMode ? "1" : "0") + " QuickHB=" + (mQuickHbMode ? "1" : "0"));
 
-        AppMaster appMaster = new AppMaster(this, masterUrl, appConfig.cmdid, bundleWithMpApp);
+        String cmdid = appConfig.cmdid;
-        appMaster.start();
+        if (TextUtils.isEmpty(cmdid)) {
+            cmdid = getSerialNo();
+        }
+        AppMaster appMaster = new AppMaster(this, masterUrl, cmdid, bundleWithMpApp);
+        appMaster.start(isCriticalTime());
+        mMasterTimers++;
     }
 
     public static class AlarmReceiver extends BroadcastReceiver {