Delphes TrkCov matrix updated

[andresailer]

• Was released in delphes (3.5.0)
  • How to ensure the correct TrkCov is used? require delphes 3.5.0 and above
    • Add a check for version

[tmadlener]

Delphes doesn't export any easy to use version to the outside. What is in place currently here is the detection of the TrkCov header file:

k4SimDelphes/cmake/FindDelphes.cmake

Lines 48 to 51 in 56cd065

	# Delphes does not offer an obvious version indicator, but we need to know
	# whether the TrackCovariance module is available or not. So here we simply
	# check whether the corresponding header is installed
	find_file(DELPHES_TRACK_COV_HEADER modules/TrackCovariance.h PATHS ${DELPHES_INCLUDE_DIRS} NO_DEFAULT_PATHS)

Obviously with this we can not differentiate between 3.5.0 and the various pre versions. I seem to remember that we at some point decided to drop all support for the pre versions and simply assume that the presence of the covariance matrix ensures >= 3.5.0

[andresailer]

We should ask for or add feature that Delphes exports its version.