ISPN-4681 Preloading from shared cachestore on a new node with non-share...

...d index is skipping indexing

https://issues.jboss.org/browse/ISPN-4681

This should solve ISPN-4048 and ISPN-4595 as well;  what it does is avoid indexing during preload in all cases except if we know for sure the index is not shareable (only ram falls into this category)
ok :)
and about the first question? can't you ```return true``` and skip iteration over the remaining properties keys?