`printCriticalTargets` prints the wrong individual when using mulit-objectives

[CoolTomatos]

botsing/botsing-reproduction/src/main/java/eu/stamp/botsing/fitnessfunction/FitnessFunctions.java

Line 55 in fb4795c

LOG.info(""+g+": "+front0.get(g));

When we are using multi objectives, branching variable diversity for example, front0.get() is getting the wrong individual.