Improve stop-on-error behavior of workflow
Improve stop-on-error behavior of workflow

Don't kill tasks, but rather set workflow to STOPPED so that it can be resumed at a later stage.

TissueMAPS/TmLibrary,TissueMAPS/TmLibrary,TissueMAPS/TmLibrary,TissueMAPS/TmLibrary,TissueMAPS/TmLibrary