improve promote script to use rsync instead of cp

releng.control/promote.sh

@@ -166,11 +166,15 @@ then
      if [ !(exitCode = 0) ]
      then
 	     nTrys=$(( nTrys + 1 ))
+	     if [ $verboseFlag ] 
+	     then
+	     	echo "rsync failed with $exitCode. Retrying $nTrys times."
 	     if [ $nTrys > $maxTrys ] 
 	     then
 	     	 echo "Number of re-trys exceeded. rsync exit code: $exitCode"
 	     	 exit $exitCode
 	     fi
+	     sleep 120
      fi 
     done