178833: Non-XA JDBC: fix localTransactionMode inconsistency
In our enthusiasm to improve the non-XA JDBC we accidentally made it inconsistent with respect to the XA JDBC. This has now been fixed: if you set localTransactionMode then JTA transactions are still taken into account, if there is a transaction found for the calling thread.
148052: Modernised Spring example
We've updated the Spring example to be more modern with Java config (instead of XML) and @Transactional annotations.