[ZODB-Dev] [RFC] Allow serial to be returned as late as tpc_finish.

[Vincent Pelletier]

This makes possible for storage to allocate serial inside tpc_finish,
removing the requirement to serialise 2PC's second phase phase (tpc_vote
to tpc_finish/tpc_abort).
---
src/ZODB/Connection.py                     |   11 +++++++-
src/ZODB/interfaces.py                     |    6 +++-
src/ZODB/tests/BasicStorage.py             |    4 ++-
src/ZODB/tests/MTStorage.py                |    4 ++-
src/ZODB/tests/RevisionStorage.py          |    4 ++-
src/ZODB/tests/StorageTestBase.py          |   10 ++++---
src/ZODB/tests/TransactionalUndoStorage.py |   36 +++++++++++++++++-----------
7 files changed, 51 insertions(+), 24 deletions(-)
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