Reduce iterations of ShutdownNodesAfterParallelBuild (#2190)
Reduce iterations of ShutdownNodesAfterParallelBuild (#2190)

Flaky test, see #2079.
cdmihai/msbuild,chipitsine/msbuild,Microsoft/msbuild,AndyGerlicher/msbuild,AndyGerlicher/msbuild,rainersigwald/msbuild,chipitsine/msbuild,cdmihai/msbuild,Microsoft/msbuild,sean-gilliam/msbuild,mono/msbuild,jeffkl/msbuild,Microsoft/msbuild,rainersigwald/msbuild,sean-gilliam/msbuild,jeffkl/msbuild,cdmihai/msbuild,rainersigwald/msbuild,jeffkl/msbuild,mono/msbuild,mono/msbuild,chipitsine/msbuild,Microsoft/msbuild,sean-gilliam/msbuild,AndyGerlicher/msbuild,chipitsine/msbuild,mono/msbuild,rainersigwald/msbuild,cdmihai/msbuild,AndyGerlicher/msbuild,jeffkl/msbuild,sean-gilliam/msbuild