Made DB errors go to the exception log again

* Some DB errors are caught while others bubble up to users.
  It is useful to log the latter separately and it also provides
  more context. The exception logs have a backtrace where as the
  regular DB logs do not.

Change-Id: I7ef7693d96e0258119f714e678099e4813ca0c94
Merge "Made DB errors go to the exception log again"