syncbase: various small improvements, needed for demo

- add retry loop to RunInBatch
- make RunInBatch and RunInTransaction mirror each other
- add txn conflict logging
- other minor tweaks, e.g. comment improvements

Change-Id: Ia81dc2599a25d78231ed7f285477be8a8c627272
4 files changed
tree: 37ca72d5eea897daed4b51bce61152609a385878
  1. services/
  2. syncbase/