Switch to MPI_lang_... variables
This MR switches the CMake configuration to use MPI_<lang>_...
variables instead of the existing MPI_...
variables. Currently Nektar++ uses MPI_LIBRARY
and MPI_EXTRA_LIBRARY
, which have been deprecated for some time. In recent versions of CMake, at least on OS X, MPI_EXTRA_LIBRARY
is no longer set, meaning that Nektar++ fails to configure if MPI is enabled. A similar fix has also been applied to gsmpi which has the same issue.