Whizard2 addition, Delphes-Gaudi-KKMC updates, energy path fix

BEGINRELEASENOTES

*Workflow
CHANGE: Update of the KKMC application to work with the current k4h wrapper.
CHANGE: Update of the Delphes application to be used after an external generator with stdhep output.

*Interfaces
CHANGE: New method for the choice of Gaudi workflow that is being used.

*ITS
NEW: Addition of the Whizard2 Application to the fcc production script.
FIX: Increasing precision of the energy to the 3rd decimal digit in the output file path.

*Documentation
CHANGE: Update of the production manager documentation to include the new applications.

ENDRELEASENOTES