[dumux][test][fluidsystems] Use new class, fix header include

dumux/freeflow/stokes/propertydefaults.hh

dumux/geomechanics/el2p/propertydefaults.hh

dumux/material/fluidsystems/1p.hh

dumux/material/fluidsystems/2pimmiscible.hh

dumux/material/fluidsystems/gasphase.hh

dumux/material/fluidsystems/liquidphase.hh

dumux/porousmediumflow/1p/implicit/propertydefaults.hh

dumux/porousmediumflow/2p/implicit/propertydefaults.hh

dumux/porousmediumflow/2pdfm/implicit/propertydefaults.hh

dumux/porousmediumflow/richards/implicit/propertydefaults.hh

test/common/generalproblem/generallensproblem.hh

test/freeflow/navierstokes/navierstokestestproblem.hh

test/freeflow/stokes/stokestestproblem.hh

test/freeflow/zeroeq/zeroeqchanneltestproblem.hh

test/freeflow/zeroeq/zeroeqtestproblem.hh

test/porousmediumflow/1p/implicit/1pniconductionproblem.hh

test/porousmediumflow/1p/implicit/1pniconvectionproblem.hh

test/porousmediumflow/1p/implicit/1ptestproblem.hh

...diumflow/1p/implicit/pointsources/1psingularityproblem.hh

test/porousmediumflow/1p/sequential/test_1pproblem.hh