ndb - bug#22672

  fix another incorrect assertion


storage/ndb/src/kernel/blocks/dbtc/DbtcMain.cpp:
  clear m_transaction_nodes.clear()
  to avoid asserion in debug-compiled in releaseApiCon

storage/ndb/src/kernel/blocks/dbtc/DbtcMain.cpp

@@ -1295,6 +1295,7 @@ void Dbtc::execTCRELEASEREQ(Signal* signal)
 	   apiConnectptr.p->firstTcConnect == RNIL))
       {
         jam();                                   /* JUST REPLY OK */
+	apiConnectptr.p->m_transaction_nodes.clear();
         releaseApiCon(signal, apiConnectptr.i);
         signal->theData[0] = tuserpointer;
         sendSignal(tapiBlockref,