Review, add/modify some tasks

32: Persosim/personalization set 

Task-Url: http://github.com/PersoSim/de.persosim.simulator/pull/32
Refactoring, extract two new methods for better readability
GlobalTesterTest: removed code redundancy from getPassword and getMrz
method
moved duplicate @Override code to common ancestor
renamed perso test to better reflect tested object
XmlPersonalization: writeToFile method now forwards all Exceptions to
the caller who is capable of dealing with them.