fix in cache-layer unit tests to allow multi file systems tests to run
fix in cache-layer unit tests to allow multi file systems tests to run

placrosse/ImpalaToGo,placrosse/ImpalaToGo,ImpalaToGo/ImpalaToGo,placrosse/ImpalaToGo,ImpalaToGo/ImpalaToGo,placrosse/ImpalaToGo,ImpalaToGo/ImpalaToGo,placrosse/ImpalaToGo,ImpalaToGo/ImpalaToGo,placrosse/ImpalaToGo,ImpalaToGo/ImpalaToGo,ImpalaToGo/ImpalaToGo