fixed hashcode bug for ingredients

src/main/java/mi/hdm/GuiController.java

src/main/java/mi/hdm/TastyPages.java

...main/java/mi/hdm/controllers/RecipeCreatorController.java

src/main/java/mi/hdm/recipes/NutritionTable.java

src/main/resources/fxml/recipe-creator.fxml

src/test/java/mi/hdm/recipes/NutritionTableTest.java