ISPN-4559 Replace fails with cache loader

https://issues.jboss.org/browse/ISPN-4559
https://issues.jboss.org/browse/ISPN-4649
Yeah I was mistaken the CacheWriterInterceptor only uses the SKIP_CACHE_STORE flag, where as the loader uses both which seems a bit inconsistent - but I guess I will just ignore it and continue thinking to myself I dislike these flags :)