Refactor PointsAdder

Change method addCompletedMatch by setCompletedMatchesList because we need this list in other classes. So we should use a singleton class to put in it this list
Superate first integration test for classification class
Really clasify teams by victories
Refactor
Change victories manual comparation by a Comparator Object

Here I use the Collections sort method which can ordered a collection (in this case teamsList) according to the second parameter that should be a comparator object
Add an ArrayList<CompletedMatch> in PointsHandler constructor
Add Ranking Inner Class (MyComparator)

This inner class is to order teams by victories amount, if this amount is the same, the greater team will be the team that have more pointsDifference
Classify teams after two rounds
Merge branch 'clasificationFeature' into develop