Restructure porous media properties

Restructure solid materials

CreatePorousMediaProperties and PorousMediaProperties is used from several processes.

Move it from header to impl, which is only included
in the cpp.

Only in the cpp where the definitions are needed.

Remove MSVC ifdefs for version less than 19.00 = VisualStudio2015

... and assignment operators.

Fix two parallel tests

Small fixes
Actually not so small...

Fixes warning: suggest explicit braces to avoid ambiguous ‘else’

Comment which parts are not initialized and why.
Cleanup initialization, constness.

Correct checking of the size and proper error message.

Otherwise in the first output of secondary variables
these are uninitialized.

Not setting the matrices to zero saves few cycles.
Setting them to NaN in Debug build helps finding
uninitialized matrices.

The parameters are used for PETSc compilation.

... instead of setZero() call.
This is idiomatic and saves few cycles.

This allows the user-given flags to override previous settings.

[Jenkins] Don't build cli on 32-bit Windows builds

Process does not compile anymore under Visual Studio 32-bit.