libraries: update bouncy-castle

Update our hard-coded bouncy-castle to v1.45

The opensaml jar dependency is built against bouncy-castle v1.45, as
is jglobus and our current voms library.

Patch: http://rb.dcache.org/r/6728/
Acked-by: Tigran Mkrtchyan
Acked-by: Gerd Behrmann
Acked-by: Albert Rossi