ndb - flush signal log when it is turned off

ndb/src/kernel/blocks/cmvmi/Cmvmi.cpp

@@ -697,6 +697,7 @@ Cmvmi::execTEST_ORD(Signal * signal){
       // Do nothing
       break;
     }
+    globalSignalLoggers.flushSignalLog();
   }
 
 #endif