Fixes compile warnings, due to ClassImp(..) have extra ; and a redefined...
Fixes compile warnings, due to ClassImp(..) have extra ; and a redefined variable in RooUnfoldIds.cxx
Added -Wall -Wpedantic -Wshadow to the compile options in GNUMakefile and CMakeLists.txt
Note the pipeline failed, except for the "compile_atlas", due to lack of access to the ubuntu root docker on the pipelines.