Issue #3395056 by ELC: Revert 8.x-1.x branch to D8 compatible

Removed the core key, resulting in a minimum version of 8.8 being required. Revert event handling back to D8 classes and parameter ordering.

src/Controller/TicketValidationController.php

@@ -540,7 +540,7 @@ class TicketValidationController implements ContainerInjectionInterface {
 
     $event = new CASAttributesAlterEvent($account, $ticket);
 
-    $this->eventDispatcher->dispatch($event, CASAttributesAlterEvent::CAS_ATTRIBUTES_ALTER_EVENT);
+    $this->eventDispatcher->dispatch(CASAttributesAlterEvent::CAS_ATTRIBUTES_ALTER_EVENT, $event);
 
     $attributes = $event->getAttributes();
     if ($format == 'xml') {
@@ -596,7 +596,7 @@ class TicketValidationController implements ContainerInjectionInterface {
 
     $account = $this->loadUser($ticket->getUid());
     $event = new CASAttributesAlterEvent($account, $ticket);
-    $this->eventDispatcher->dispatch($event, CASAttributesAlterEvent::CAS_ATTRIBUTES_ALTER_EVENT);
+    $this->eventDispatcher->dispatch(CASAttributesAlterEvent::CAS_ATTRIBUTES_ALTER_EVENT, $event);
 
     if ($format == 'xml') {
       $response_text = "<cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'>