Bugfix – WVUThorns/Baikal*: Use GetBoundarySizesAndTypes() to obtain boundary information needed by Boundary_SelectVarForBC() as Boundary_SelectVarForBC() must be called in LEVEL mode. Fixes crash when Baikal* is run on certain, specific numbers of MPI processes. Also update Baikal*/READMEs for consistency

--
Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2432/backport-baikal-boundary-handling-fix-to