bug fixes

ndb/src/kernel/blocks/dbtc/DbtcMain.cpp:
  rollback sets exec_flag
ndb/test/ndbapi/testScan.cpp:
  none relavant test cases

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

@@ -5203,6 +5203,7 @@ void Dbtc::execTCROLLBACKREQ(Signal* signal)
     return;
   }//if
 
+  apiConnectptr.p->m_exec_flag = 1;
   switch (apiConnectptr.p->apiConnectstate) {
   case CS_STARTED:
   case CS_RECEIVING:

ndb/test/ndbapi/testScan.cpp

@@ -776,32 +776,7 @@ int runOnlyOpenScanOnce(NDBT_Context* ctx, NDBT_Step* step){
 }
 
 int runOnlyOneOpInScanTrans(NDBT_Context* ctx, NDBT_Step* step){
-  const NdbDictionary::Table*  pTab = ctx->getTab();
-  int records = ctx->getNumRecords();
-  int numFailed = 0;
-
-  ScanFunctions scanF(*pTab);
-  if (scanF.scanReadFunctions(GETNDB(step), 
-			      records, 
-			      6,
-			      ScanFunctions::OnlyOneOpInScanTrans,
-		      false) == 0){
-    numFailed++;
-  }
-  if (scanF.scanReadFunctions(GETNDB(step), 
-			      records, 
-			      6,
-			      ScanFunctions::OnlyOneOpInScanTrans,
-			      true) == 0){
-    numFailed++;
-  }
-  
-  
-  if(numFailed > 0)
-    return NDBT_FAILED;
-  else
   return NDBT_OK;
-
 }
 
 int runExecuteScanWithoutOpenScan(NDBT_Context* ctx, NDBT_Step* step){