G4AtlasUserActionConfig: Fix incorrect import for stopping particle simulation
ISF_ToolsConfig.py
and G4CosmicFilterConfig.py
both implemented a Cfg function with the same name.
The incorrect one was imported by G4AtlasUserActionConfig.py
. This MR fixes this and renames the method
in ISF_ToolsConfig.py
although this one will probably turn out to be obsolete and can be removed in a
follow-up MR.