retrun confirmDownRetries to 10, tourney mac compatible

At some point the cluster code was modified to do 120 tries to confirm
if a node was down which is a bit excessive for production. My
understanding is that this was done to help trigger or fix a problem
during testing which is hopefully no longer relevant.

Also changed the tournament script to use what I think are more
standard bash-isms that work on mac. Please confirm this still works
on Linux as well.

cluster.go

@@ -62,7 +62,7 @@ const (
 	resizeJobActionAdd    = "ADD"
 	resizeJobActionRemove = "REMOVE"
 
-	defaultConfirmDownRetries = 120
+	defaultConfirmDownRetries = 10
 	defaultConfirmDownSleep   = 1 * time.Second
 )
 

tournament.sh

@@ -8,5 +8,6 @@
 for i in rbf lmdb roaring rbf_lmdb rbf_roaring lmdb_rbf lmdb_roaring roaring_rbf roaring_lmdb ; do
    echo "$(date) starting ${i}, output to tourna.log.${i}"
    echo "***=== ${i} ====================*** $(date)" &> tourna.log.${i}
-   PILOSA_TXSRC=${i}  make testv-race &>> tourna.log.${i}
+   PILOSA_TXSRC=${i}  make testv-race 2>&1 > tourna.log.${i}
 done
+