[2p][sequential] Adapt headers

dumux/material/spatialparams/sequentialfv.hh

...diumflow/2p/sequential/diffusion/cellcentered/pressure.hh

...diumflow/2p/sequential/diffusion/cellcentered/velocity.hh

...rousmediumflow/2p/sequential/diffusion/mimetic/mimetic.hh

...umflow/2p/sequential/diffusion/mimetic/mimeticadaptive.hh

...ousmediumflow/2p/sequential/diffusion/mimetic/operator.hh

...mflow/2p/sequential/diffusion/mimetic/operatoradaptive.hh

...ousmediumflow/2p/sequential/diffusion/mimetic/pressure.hh

...mflow/2p/sequential/diffusion/mimetic/pressureadaptive.hh

...umflow/2p/sequential/diffusion/mpfa/lmethod/2dpressure.hh

...p/sequential/diffusion/mpfa/lmethod/2dpressureadaptive.hh

...p/sequential/diffusion/mpfa/lmethod/2dpressurevelocity.hh

...tial/diffusion/mpfa/lmethod/2dpressurevelocityadaptive.hh

...umflow/2p/sequential/diffusion/mpfa/lmethod/2dvelocity.hh

...p/sequential/diffusion/mpfa/lmethod/2dvelocityadaptive.hh

...umflow/2p/sequential/diffusion/mpfa/lmethod/3dpressure.hh

...p/sequential/diffusion/mpfa/lmethod/3dpressureadaptive.hh

...p/sequential/diffusion/mpfa/lmethod/3dpressurevelocity.hh

...tial/diffusion/mpfa/lmethod/3dpressurevelocityadaptive.hh

...umflow/2p/sequential/diffusion/mpfa/lmethod/3dvelocity.hh