Runs a lighting build for specific, or all, map(s). Reusing the ResavePackages commandlet. The commandline for the commandlet is:
ProjectName -run=resavepackages -buildlighting -allowcommandletrendering -map=optionalmapname
Script added to UAT to automate the process. The commandline for this is:
RebuildLightmaps -project="My:/Absolute/Project/Path.uproject" -MapsToRebuildLightMaps=OptionalMapName
[CL 2709358 by Terence Burns in Main branch]
