Merge pull request #9240 from masterleinad/use_more_range_based_for_loops

Turn all for loops using "begin_active" into ranged-based ones

diff --cc include/deal.II/fe/fe_values.h
Simple merge

diff --cc include/deal.II/matrix_free/fe_evaluation.h
Simple merge

diff --cc include/deal.II/numerics/vector_tools.templates.h
Simple merge

diff --cc source/dofs/dof_tools.cc
Simple merge

diff --cc source/grid/grid_generator.cc
Simple merge

diff --cc source/grid/tria.cc
Simple merge