Thanks to Kilian for contributing the actual change of all the test's spatial params!

[porousmediumflow] fix problem constructor

Closes #486

See merge request !942

The Problem constructor called the SpatialParams constructor in the
intializer list, passing itself via `this->asImp()`. This lead to
segfaults since the constructor of the ParentType had not been called
before. Fix by copying the working constructor instead of calling it.

[box] fix scvf corner computation for tetrahedra

See merge request !941

[pmflow] Add problem constructor getting the spatial params

Closes #459

See merge request !938

Feature/remove philtophob

Closes #483

See merge request !935

[io][staggered] use new constructor argument order of output module

See merge request !936

Remove buggy and obsolete PhilToPhobLaw -> use wettingPhase() in spatial params to set the wetting phase index

What was broken:
The test used philtophob law which used the wrong residual saturations. It went into efftoabslaw with
the non-wetting saturation so swr and snr where the wrong way around. It also overwrote the krw/krn function
of the material law in use with a quadratic/cubic law. It also defined the capillary pressure negative but then
it would be pc = pw-pn.

What was fixed:
Use the wettingPhase function instead to make the gas phase the wetting phase

This changed:
- the pw solution as swr and snr were corrected (the wrong way around pw was equal)
- the pc solution because it is now positite
- the mobilities as they didn't use the real van genuchten curves

Feature/nonconforming vtk output

See merge request !932

Dennis Gläser authored 6 years ago and Timo Koch committed 6 years ago

This commit also gets rid of compatibility with Dune 2.5

[2p] Update incompressible reference both mpfa and tpfa pass with same solution

See merge request !933

[2p][test] Update fracture test reference

See merge request !931

[fickslaw][network] Consider that transmissibilities can be zero

See merge request !930

Free the Box Method's Darcy's law from TypeTag

See merge request !929

[privarswitchNetwonSolver] Change final to override for virtual methods

See merge request !927

* allow inheritance from this class

Feature/extrusion factor staggered

See merge request !914

Freeflow/lowrekepsilon cleanup

See merge request !911

[freeflow] Implement Neumann BC for momentum

See merge request !871

[staggered] Do not call sourceAtPos in localRes

See merge request !912

Fix/box scvf construction

See merge request !924

This commit should improve the readability as on 3d grids we determine the
boundary scvf corners on 2d geometries (i.e. faces). Thus, the offset
we mean here is the offset for the edges.