Use method levelGridView instead of the soon-to-be-deprecated levelView

Conflicts:
	dune/grid/io/file/test/subsamplingvtktest.cc
	dune/grid/test/gridcheck.cc
	dune/grid/test/test-geogrid.cc
	dune/grid/test/test-oned.cc
	dune/grid/test/test-parallel-ug.cc

Signed-off-by: Christoph Grüninger <gruenich@dune-project.org>
Remove test whether codim>0 entity numbering conforms with subface numbering.

Because that implies that entities of codim>0 look differently depending on
the element through which they were obtained.

See https://dune-project.org/flyspray/index.php?do=details&task_id=1428
for more details.
(cherry picked from commit 3ee3612cc15fa485b971c33fa2039ce33493a8cd)

Signed-off-by: Christoph Grüninger <gruenich@dune-project.org>