create EoLS for last LS in data dir
no fast csv output in global EOL update
backporting another fix from the devel branch:
return in case of empty fast csv definition
create EoL on EoR only if BU wrote it
*switch to new file naming scheme (runX_lsX_typeX_#instance.ext)
*new json output definition
new header with the file naming convention utilities
Merge branch 'async-reader-71X' into devel