Cherry-pick "Merge branch 'AddLwtnnToAthAnalysis-1.0-20170831' into '1.0'" into master
Add lwtnn to AthAnalysis, 1.0 branch (2017.08.31.)
See merge request !136 (merged)
Add lwtnn to AthAnalysis, 1.0 branch (2017.08.31.)
See merge request !136 (merged)