Implemented xAOD skimming algorithm and event flagging analysis job, to be used in conjunction (flagging events passing one or more cuts with a flagging job attached, skimming algorithm picking up the flag and using TEvent::copy to copy event to (skimmed) output file. Note: requires fixed version of TEvent, will crash when used in analysisBase 2.4.33.
Additionally, TQXSecParser objects are no longer merged in TQFolder::mergeObjects as this caused a tremendous (and completely pointless) overhead during sample folder merging.
Closes HWWATLAS-196