Rails5: Fix audit event spec

ee/changelogs/unreleased/rails5-fix-audit-events-spec.yml

+---
+title: 'Rails5: Fix audit event spec'
+merge_request: 6940
+author: Jasper Maes
+type: fixed

ee/spec/features/projects/audit_events_spec.rb

@@ -80,6 +80,8 @@
         find('.ic-remove').click()
       end
 
+      wait_for_all_requests
+
       visit project_audit_events_path(project)
 
       expect(page).to have_content('Remove deploy key')