JIRA: https://jira.spring.io/browse/INT-4178
The `JdbcLockRegistry` does not retry `CannotSerializeTransactionException` thrown by `DefaultLockRepository.acquire` which in turn causes `LockRegistryLeaderInitiator`s thread to get stuck.
* catch `CannotSerializeTransactionException` on `DefaultLockRepository.acquire` and ignore it to ensure a retry
**Cherry-pick to 4.3.x**
(cherry picked from commit 8198ff1)