Clean up trustregionsolver for use with or without dune-parmg - less compiler flags

Use interiorBorder overlap, this is the correct overlap for the parallel solver

Use process number for the tapes in ADOLC, important in case ADOLC has to write a tape to disk then no two processes use the same file

Add parameter dampening in the parset-file

Remove duplicate outputs, only print on one process

Add two test parset-files for testing parmg-computations

@oliver.sander_at_tu-dresden.de: can you have a look?

mentioned in merge request !23 (merged)

I did have a look, and I liked (most of) it. I separated the different conceptual changes into separate commits, and the result is !23 (merged). As !23 (merged) supersedes this merge request I will close this one.

closed