Do not commit the current transaction then begin another when calling setXXX() methods from a transaction.
This avoid commit partial queries that may put the relational database in a inconsistent state (eg. a new partition table but not the last PTID).

git-svn-id: https://svn.erp5.org/repos/neo/trunk@1380 71dcc9de-d417-0410-9af5-da40c76e7ee4