Ensure the the set value works for combo boxes
Removing test for processor as it does not compile.
Seems like IzPack 5 no longer supports this for combo boxes.
Fixing combo and radio tests for userinput panels, since default value
is no longer null but the first choice.
Modify test for combo4 to also check that the set attribute does not
override the variable set in installData.
Merge pull request #265 from mtjandra/IZPACK-1154

[IZPACK-1154] - Fix for set attribute of Combo fields and Tests