fix: use local degree ordering for highcorner()
(cherry picked from commit aeadebaaa1e1dd0a5398e4f834e5b5f8c29012de)

Signed-off-by: Andreas Steenpass <steenpass@mathematik.uni-kl.de>
chg: update test for realclassify.lib
(cherry picked from commit d5fc79905f2d495218a62a46ccc9644897361ff6)

Signed-off-by: Andreas Steenpass <steenpass@mathematik.uni-kl.de>
Merge pull request #521 from steenpass/realclassify_sw

fix: use local degree ordering for highcorner()