JIRA: https://jira.spring.io/browse/INT-4126
Looks like `WATCH` doesn't provide good isolation when the call is performed concurrently at the same time from different Threads.
* Change locking algorithm as it is recommended by Redis `SET` command: http://redis.io/commands/set:
```
SET resource-name anystring NX EX max-lock-time
```
* Add `@Repeat(10)` to the `AggregatorWithRedisLocksTests#testDistributedAggregator()` since that helped to reproduce the issue
**Cherry-pick to 4.3.x & 4.2.x**
Conflicts:
spring-integration-redis/src/main/java/org/springframework/integration/redis/util/RedisLockRegistry.java
Resolved.
035c407573