OrcasEngine should not use ProductVersion (#1303)
OrcasEngine should not use ProductVersion (#1303)

Logic copied over from ProjectCollection.Version, since that type can't be accessed from the deprecated engine
sean-gilliam/msbuild,AndyGerlicher/msbuild,jeffkl/msbuild,mono/msbuild,cdmihai/msbuild,AndyGerlicher/msbuild,sean-gilliam/msbuild,rainersigwald/msbuild,rainersigwald/msbuild,rainersigwald/msbuild,AndyGerlicher/msbuild,mono/msbuild,sean-gilliam/msbuild,rainersigwald/msbuild,AndyGerlicher/msbuild,jeffkl/msbuild,Microsoft/msbuild,cdmihai/msbuild,Microsoft/msbuild,mono/msbuild,sean-gilliam/msbuild,chipitsine/msbuild,chipitsine/msbuild,chipitsine/msbuild,chipitsine/msbuild,cdmihai/msbuild,jeffkl/msbuild,Microsoft/msbuild,jeffkl/msbuild,mono/msbuild,cdmihai/msbuild,Microsoft/msbuild