upgrade to jena 2.11.1; tests pass

jena-arq-2.10.1.jar  -> jena-arq-2.11.1.jar
jena-core-2.10.1.jar -> jena-core-2.11.1.jar
jena-iri-0.9.6.jar   -> jena-iri-1.0.1.jar
jena-tdb-0.10.1.jar  -> jena-tdb-1.0.1.jar

removed log4j-config.jar; not provided with jena 2.11.1 distribution