A class of variables similar to those stored in the
integration point data but needed only temporary for
the assembly process.

The propertie belongs into the material models.
Computations in near future will require only constant
solid phase volume fraction, so the switch is added
to separate constant and non-constant parts.

Related issue:
ogs/ogs#3173

On Windows absolute path inside xdmf to hdf was incorrect. Fix to relative path because file must be transferable

Krel fix.

Jacobian fix.

Additional Jacobian term.

Typo fix

Changed to dot product

replace benchmark file

capitalize liquid l

fix k_rel in Picard local assembly

Removed wrong matrix entries.

Removed unused variable

, which is based on a test of the ARESH project.