Revert "Merge pull request #5475 from cms-sw/revert-5436-topythia8200pre1_73"
This is the revert of the revert of the pythia 8.2 interface changes.

This reverts commit 9752db5f182ebca1b4621e91a2eb0e46ceae8a78, reversing
changes made to 3b1c7de819324e090aef319dab7b5bcb57b35a11.
Move to pythia8 internal jet matching code and remove cms copy.  Remove no-longer-needed workaround for slha header and pass it properly through pythia8 lhe interface
Merge pull request #5551 from bendavid/pythia8200pre2interface

Pythia8.200pre2 interface changes