PlayerIPAPI

* Gave sqlLoadTime a more sane default in the config
* Fixed connection leaks with Redis
* (Hopefully) fixed stale caching for in-memory caches
* API now returns a guava ImmutableSet (function return values are still Sets)
* Fixed issue with in-memory caches not being invalidated at the correct time when Redis/Rabbit are used
* Redis pool now uses a more sane max size
* Moved Redis connection creation (from pool) to new utility class for readability and to avoid bugs