A master load a partition table from the network only during recovery, this
operation requires a different behaviour than the load() for other nodes.
Check incoming data and raise before any change on the partition table to
avoid inconsistency between ptid and partition table data.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2091 71dcc9de-d417-0410-9af5-da40c76e7ee4