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- Storage nodes start to replicate a partition when all transactions that were
pending when the oudated partition was added are committed.
- Transactions are registered by the master from the tpc_begin step.
Signed-off-by: Grégory <gregory@nexedi.com>

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2649 71dcc9de-d417-0410-9af5-da40c76e7ee4