JCR-3581: Incorrect bitwise arithmetic in BitsetENTCacheImpl.BitsetKey.compareTo implementation - wrong bit mask value used

[Ate Douma]

I didn't see yet any feedback on this [1].

Its not like a very critical bug (probably) but still serious enough IMO to 
consider fixing.

Anyone interested to at least take a look at it?

Regards, Ate

[1] https://issues.apache.org/jira/browse/JCR-3581