DMP is illegally called for ordinary ADERDG-Solver

This are actually two problems:

1. For an ordinary ADERDG-Solver (not Limiter) where the variable dmp-observables is not given, the default value is not 0 but instead just a random number (NaN or MaX or whatever for int). This is very bad but solvable in the Parser for me.

2. The method mapDiscreteMaximumPrincipleObservables in the abstract ADERDG solver is called. This should not happen at all! Why does it happen?