Upgrade OSCache to version 2.4.1

Release Notes - OSCache - Version 2.4.1


** Bug
    * [CACHE-279] - LRUCache loses entries when updated by mutliple threads.
    * [CACHE-296] - For a Cache class the cacheFlushed method is not being invoked on the CacheEntryEventListener.
    * [CACHE-297] - max-age parameter not set on ResponseContent object returned from cache when using MAX_AGE_NO_INIT



** Task
    * [CACHE-209] - Review: Handling junit failures in threads other than the main thread