MueLu: move Xpetra-specific Belos adapter files to Belos
Created by: tawiesn
We should move the following files
BelosOperatorT.hpp BelosXpetraAdapter.hpp BelosXpetraAdapterMultiVector.hpp BelosXpetraAdapterOperator.hpp
in muelu/adapters/belos
to a new xpetra
folder in Belos.
This would allow to use preconditioners derived from Xpetra::Operator<>
directly with Belos.