Creating test functions for the classes Card/CardBuilder/CardType/CardTypeManager.

Creating tests for the classes at the following addresses: module-a/src/main/java/fr/unantes/sce/trivial/Card.java module-a/src/main/java/fr/unantes/sce/trivial/CardBuilder.java module-a/src/main/java/fr/unantes/sce/trivial/CardType.java module-a/src/main/java/fr/unantes/sce/trivial/CardTypeManager.java