[!108] Implement a convergencetest for systems
Merge branch 'feature/system-convergence-tests' into 'master'
This fixes #128
See merge request quality/dune-testtools!108
Closes #128 (closed)
(cherry picked from commit 7f873c85)
333e6ecf Implement a convergencetest for systems d90d5b1a Fix indentation and test data c9e1e60b Fix newline at eof 6332a696 Correctly default testsections 44d086a3 [doc] Document new beahviour of convergence test dce9df7f Remove superfluous normkeys.