problem with Ifpack2::AdditiveSchwarz and sparse direct subdomain solves
Created by: jhux2
A user has reported that Ifpack2's additive Schwarz with sparse direct solves from Amesos2 does not work properly as a smoother in MueLu. After an initial look, I discovered that the Ifpack2 test that tests this was accidentally disabled (I don't know when). I enabled it locally and found the test fails.