JIRA: https://jira.spring.io/browse/INT-4105
Fixes GH-1888
The lock in Redis can be expired in between `obtain()` calls.
So, even if we return a new lock instance, the old one must clear properly.
* Add `lock.unlock()` to the `obtain()` if the case of expiration in Redis.
* Add `warn` for the exception on the `lock.unlock()`. We don't care about error here and just proceed to a new instance.
**Chery-pick to 4.3.x**
Remove the lock reference from `weakThreadLocks` as well
Add `registry.setUseWeakReferences(true);` to test-case
* Add assert for `lock.unlock()` in case of expiration
* Add `UUID.randomUUID()` for the registry key to avoid cross-talking during concurrent builds, e.g. on the CI server
https://build.spring.io/browse/INT-MASTER-352
This is actually a fix for the
JIRA: https://jira.spring.io/browse/INT-4083
450ac7f18d