Add check for new email addition in audit test

We're not verifying that the new email gets added for audit
tests. Thus the email can fail to be added, then the test
continues and only fails on verifying in the audit log, but
we can check that the email was indeed added before proceeding.

qa/qa/specs/features/ee/browser_ui/1_manage/instance/instance_audit_logs_spec.rb

@@ -60,9 +60,12 @@ module QA
           new_email_address = 'new_email@example.com'
           Page::Main::Menu.perform(&:click_settings_link)
           Page::Profile::Menu.perform(&:click_emails)
-          Page::Profile::Emails.perform do |emails|
-            emails.add_email_address(new_email_address)
-            emails.delete_email_address(new_email_address)
+          Support::Retrier.retry_until(sleep_interval: 3) do
+            Page::Profile::Emails.perform do |emails|
+              emails.add_email_address(new_email_address)
+              expect(emails).to have_text(new_email_address)
+              emails.delete_email_address(new_email_address)
+            end
           end
         end