beginning of refactoring code and tests on remove
Merge branch 'master' of https://github.com/genericsystem/genericsystem2014.git
Deletig useless arguments when removing (RestructurationService)
Spliting VertexRestructurationTest into SetValueTest and RemoveTest
Using RollbackCatcher instead of rewriting a try catch (RemoveTest)
Moving methods into AbstractTest with protected visibility (printXXX and
findElement(Serializable, List<Vertex>)).