LoKi: Change a way how functors get the context.
this way should be much more safe and robust and after few minor pending case-by-case remaining fixes should be perfectly ok for the Hive
LoKiHlt are fixed accordingly (and it is a major work..)
LoKiNumbers - there is nothing to fix
Rec/LoKiTrack is fixed
LoKiTriggerin HLT project is not fixed yet, it should be easy to fix - to be done after the full clean complete build of LHCB/PHYS/...
updated functor cache (with the different factory signature) is not tested properly yet. By-eye the auto-generated C++ code looks ok, but here the clean build in nightlies of the full Stripping/DaVinci stack is needed.