JIRA: https://jira.spring.io/browse/INT-4396
When target distributed `Lock` implementation throws an exception, e.g.
in case of no connection to the service, the `LockRegistryLeaderInitiator`
exists the loop and can come back to the elections only after restart
* Catch all the exception on `this.lock.tryLock()` and resubmit
`LeaderSelector` for a new locking cycle if
`LockRegistryLeaderInitiator.isRunning()` and `InterruptedException`
* Remove diagnostics from the `JdbcLockRegistryLeaderInitiatorTests`
since this fix confirms that we just didn't have a reconnect logic before
when this test failed sporadically
**Cherry-pick to 4.3.x**
09aeaac4da