Test for using BNodes via <_:id> form in ParameterizedSparqlString that demonstrates they cannot be used if the variable being injected occurs in the template portion since new BNodes will be minted rather than the existing one being copied

This is indirectly related to JENA-500 and demonstrates that we likely need to restore initial bindings support for updates in some form or another

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1512414 13f79535-47bb-0310-9956-ffa450edef68
Extra test case used to sanity check update behaviour around BNode copying

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1512415 13f79535-47bb-0310-9956-ffa450edef68