ISPN-4559 Replace fails with cache loader

https://issues.jboss.org/browse/ISPN-4559
https://issues.jboss.org/browse/ISPN-4649
@wburns I think you mean `SKIP_CACHE_STORE`, that's another flag :) Yes, it can break consistency when one owner has the new value in memory and another has the old value in the store - but if you're worried about that you shouldn't use it...