Merge branch 'bugfix/periodic-simplex' into 'master'
[bugfix][Periodic] Fix an issue with refinement of conforming boundaries.
See merge request !146 (merged)
(cherry picked from commit ddc2d16a)
f7311b9c [bugfix][Periodic] Fix an issue with refinement of conforming f10d3d04 [feature][Transport] added ball transport problem for testing periodic