Cherry-pick of "Merge branch 'AthAnalysisPyAnalysis-1.0-20170620' into '1.0'" for master
Find pyanalysis in AthAnalysisExternals, 1.0 branch (2017.06.20.)
See merge request !78 (merged)
Find pyanalysis in AthAnalysisExternals, 1.0 branch (2017.06.20.)
See merge request !78 (merged)