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.
- add tournament.sh to do all pair-wise comparisons of blue-green backends.
- isolate txstores away from roaring index/ directories with indexname.index.txstores@@@ dirs.