#314 Evaluate default permission on enum, remove default from handler interface

- Evaluate permission for DefaultPermission on the enum itself
- Remove boolean default from PermissionHandler for hasPermission()
- Remove some unused / intermediary hasPermission() flavors in PermissionsManager

src/main/java/fr/xephi/authme/permission/handlers/VaultHandler.java

@@ -27,7 +27,7 @@ public class VaultHandler implements PermissionHandler {
     }
 
     @Override
-    public boolean hasPermission(Player player, PermissionNode node, boolean def) {
+    public boolean hasPermission(Player player, PermissionNode node) {
         return vaultProvider.has(player, node.getNode());
     }