Fix unit tests to run properly on Linux/OS X
Fix unit tests to run properly on Linux/OS X

chipitsine/msbuild,chipitsine/msbuild,cdmihai/msbuild,sean-gilliam/msbuild,mono/msbuild,jeffkl/msbuild,mono/msbuild,Microsoft/msbuild,jeffkl/msbuild,Microsoft/msbuild,mono/msbuild,sean-gilliam/msbuild,chipitsine/msbuild,chipitsine/msbuild,sean-gilliam/msbuild,jeffkl/msbuild,cdmihai/msbuild,rainersigwald/msbuild,rainersigwald/msbuild,cdmihai/msbuild,cdmihai/msbuild,AndyGerlicher/msbuild,rainersigwald/msbuild,Microsoft/msbuild,sean-gilliam/msbuild,AndyGerlicher/msbuild,AndyGerlicher/msbuild,jeffkl/msbuild,mono/msbuild,Microsoft/msbuild,AndyGerlicher/msbuild,rainersigwald/msbuild