[ZODB-Dev] Transaction is not cleaned up (on abort).

[Syver Enstad]

ZODB 3.2

I use setLocalTransaction on the Connection which means that the _id
field is not set. The code in abort cases on the _id field and refuses
to do anything to clean up the Transaction object. Since I set the
user property and use this on commit, it is a bit unsettling that this
property is carried over into other users transactions. No big deal
but I maybe someone is interested in it.