[test.linearelliptic-swipdg] set defaults for polorder, space and la backend
[test.OS2014_localization_study] added

See the .vtu files for results.
[test.OS2014]

* removed localization parts (moved to OS2014_localization_study)
* updated names
* added expected results for swipdg
[cmake] updated tests
[test.OS2014] removed parametric convergence study

Moved to OS2014_parametric_convergence_study.
moved test{OS2014 -> OS2014_nonparametric_convergence_study}
[cmake] update