Enable parallel runs of platyPS per version#4171

Merged

sdwheeler merged 3 commits intoMicrosoftDocs:stagingfrom SteveL-MSFT:parallel

Apr 18, 2019

+126-87

Commits on Apr 17, 2019

make building versions of docs in parallel
SteveL-MSFT
committed

Commits on Apr 18, 2019