Petri Net corrigé avec Tests complets sans tests 7.5 et 7.4

src/main/java/org/petriNet/Arc_SORTANT.java

src/main/java/org/petriNet/ReseauPetri.java

src/main/java/org/petriNet/Transition.java

src/test/java/org/petriNet/ReseauPetriTest.java

src/test/java/org/petriNet/TransitionTest.java