HLT: Migrate code to IOptionsSvc

Migrate several packages under HLT/ from the deprecated IJobOptionsSvc interface to IOptionsSvc. The code actually got a bit simpler, mostly because there are less string <-> Property conversions needed and thus less error checking. For the Python bindings, I would have liked to use IOptionsSvc::broadcast directly, but I cannot figure out how to use that interface from Python. Trying to construct a std::regex always ends up in a segfault in cling.