Task #8437: Add support for global fs in node scripts to prevent rsyncing files within the same filesystem

Task #6656: Add a full working version with backwards compatibility. Add a skip on stopped threads to prevent printing to xml. Ready for internal review and external review

Task #5028: merge from release branch to changes needed to run in juropa. Excluding parset adaptions

Task #4518: add beamtables again in prepare step: the bbs failed before. investigate the total time to run with a full bbs run

- Implement a mapfile replacement: DataMap adding a skip field to the host, file pair.
msss_target_pipeline and msss_calibrator_pipeline do now implement the skip behaviour for dataproduct.
msss_imaging_pipeline use the new DataMap and MultiDataMap classes for dataproduct communication. Does NOT listen to the skip field (default behaviour)
- Some minor changes in the location of imports (from start of module to function) to allow running of unittest on windows
- Update of the unittest to reflect the new behaviour and adding of DataMap unittests

ndppp missing complete timeslice exception
GSM producing double sources in sourcelist

Delete temp files from /tmp
World readable parsets
Minor comment and code style fixes