CLEREZZA-683: Implemented functionality that should correctly handle hash code conflicts for BNodes. The assumption was that such conflicts are the reason why sometimes iterators do return a different number of triples as for the SimpleMGraph implementation. As this is not reproduceable with the Mac JavaVM we will need to wait for some time to see if the code works as expected

git-svn-id: https://svn.apache.org/repos/asf/stanbol/trunk@1437077 13f79535-47bb-0310-9956-ffa450edef68