Filip Matzner authored May 07, 2018 and Brad King committed May 09, 2018

Update `mpi_python##` and `numpy##` component dependencies to honor
python version suffixes on components named by the caller.  Although
upstream Boost did not add version suffixes prior to version 1.67, it is
commonly done by distros.  Honor suffixes specified by project code.
Projects must take responsibility for naming distro-specific component
suffixes for versions prior to 1.67.

Fixes: #17892, #17970