[154] The sum of all probabilities assigned to branches of an exclusive choice split have to add up to 100 %

The script now looks for all the objects of type 'DecisionNotSpecified'
and first checks whether there are branches with probability assigned
to it. If so, it identifies type mismatches (in case there has been
assigned a string as probability) and missing probabilities as well.

In a next step it checks whether the probabilites add up to 100 % and
updates the log message in the process.
Merge branch 'feature-154' into develop