Wrap energy calculation and solving in a try-catch statement...

Wrap energy calculation and solving in a try-catch statement (mixedriemanniantrsolver, mixedlocalgfeadolcstiffness)

In case an error occurs while solving or calculating the energy, the program does not stop
but the error is handled in the Mixed-Riemannian Trust-Region solver and the program continues
with a smaller trustregion-radius.