Merge branch 'cleanup/smallCleanups' into 'master'

dumux/assembly/fclocalresidual.hh

dumux/freeflow/navierstokes/mass/1p/fluxvariables.hh

dumux/freeflow/navierstokes/mass/1p/indices.hh

dumux/freeflow/navierstokes/mass/1p/model.hh

dumux/freeflow/navierstokes/mass/1p/volumevariables.hh

dumux/freeflow/navierstokes/mass/1pnc/advectiveflux.hh

dumux/freeflow/navierstokes/mass/1pnc/indices.hh

dumux/freeflow/navierstokes/mass/1pnc/localresidual.hh

dumux/freeflow/navierstokes/mass/1pnc/model.hh

dumux/freeflow/navierstokes/mass/1pnc/volumevariables.hh

dumux/freeflow/navierstokes/model.hh

dumux/freeflow/navierstokes/momentum/brinkman.hh

dumux/freeflow/navierstokes/momentum/cvfe/indices.hh

dumux/freeflow/navierstokes/momentum/cvfe/localresidual.hh

dumux/freeflow/navierstokes/momentum/localresidual.hh

dumux/freeflow/navierstokes/momentum/problem.hh

dumux/freeflow/navierstokes/scalarfluxhelper.hh

...x/freeflow/navierstokes/scalarfluxvariablescachefiller.hh

dumux/freeflow/navierstokes/staggered/fluxvariables.hh

dumux/freeflow/navierstokes/volumevariables.hh