make sure the contact message is added for nodes that don't have any …

…exempt users

before this change, if viewing an embargoed object that didn't have any exempt users, then the foreach loop wouldn't be run for the empty array and the message wouldn't be added.

src/Plugin/Block/EmbargoesEmbargoNotificationBlock.php

@@ -170,12 +170,12 @@ public function build() {
             if ($user['target_id'] == \Drupal::currentUser()->id()) {
               $embargo_info['user_exempt'] = TRUE;
             }
-            else {
-              $contact_message = $t->translate(
-                $this->notificationMessage,
-                ['@contact' => $this->adminMail]
-              );
-            }
+          }
+          if (!$embargo_info['user_exempt']) {
+            $contact_message = $t->translate(
+              $this->notificationMessage,
+              ['@contact' => $this->adminMail]
+            );
           }
 
           $embargo_info['dom_id'] = Html::getUniqueId('embargo_notification');