Add standard open file message; minor updates [14.0.X]#44342

Merged

cmsbuild merged 2 commits intocms-sw:CMSSW_14_0_Xfrom namapane:NAT-44293_140X

Mar 8, 2024

+8-3

Commits on Mar 7, 2024

Add file open message as required by EOS scripts (cms-sw#44293 )
namapane
committed
Add missing branch types; close histogram files in the proper place
namapane
committed