Cherry-pick of "Merge branch 'FastJetContribFix-1.0-20171113' into '1.0'" into master
FastJetContrib MacOS Fix, 1.0 branch (2017.11.13.)
See merge request !172 (merged)
FastJetContrib MacOS Fix, 1.0 branch (2017.11.13.)
See merge request !172 (merged)