Updates related to the new athenaHLT.py
This MR contains several changes related to the new athenaHLT.py that will live in the offline repository. The individual commit messages contain hopefully enough details to explain what was changed.
All these changes should not have any impact on runHLTMPPy.py but please verify that things still work as before on your side.
For the moment I concentrated on the job options configuration as we don't really have anything that we could run from the DB. I will come back to the DB configuration side at a later point as there is certainly some more cleanup to be done (e.g. we should not be hard-coding the connection strings but rather generate them dynamically from the dblookup files if needed at all).
Make sure to "hide whitespace changes" when looking at the diff as I made the code mostly compliant with pyflakes.