Update git submodules
* Update oslo.db from branch 'master' to 64e50494f219b5c06ed79f947c91cdb7f37cb0d6 - Use SQLAlchemy native pre-ping This functionality has been available upstream since SQLALchemy 1.2 [1]. However, for oslo.db to use this feature while maintaining full behavior, we need at least SQLAlchemy 2.0.5 to provide complete event support. In particular, oslo.db adds several new "is disconnect" conditions including those specific to Galera. Behavior of the handle_error event is modified to expect the "pre-ping" calling form, which may not have an "engine" present (only a dialect), and additionally takes advantage of the new is_pre_ping attribute which informs on the correct way to affect the disconnection status within the ping handler. Change-Id: I50d862d3cbb126987a63209795352c6e801ed919
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Subproject commit 64e50494f219b5c06ed79f947c91cdb7f37cb0d6
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