Fix: Capabilities in Trequirement property page are listed again

Author: Amina-Moussaoui

ToscaDesigner/src/main/java/fr/softeam/toscadesigner/handlers/propertypages/serviceTemplate/TRequirementDefinitionPropertyPage.java

@@ -72,7 +72,7 @@ public void update(IModulePropertyTable table) {
         table.addProperty("Name", _element.getElement().getName());
         // Capability
         table.addProperty("Capability", this._element.getCapability() != null ? this._element.getCapability().getElement() : null,
-                Arrays.asList(Metamodel.getMClass("Attribute")), new IMObjectFilter() {
+                Arrays.asList(Metamodel.getMClass("Class")), new IMObjectFilter() {
                     @Override
                     public boolean accept(MObject element) {
                         return TCapabilityDefinition.canInstantiate(element);