add loader on attaching domain

Signed-off-by: Thomas Citharel <tcit@tcit.fr>
2 jobs for attach-domain-indicator in 4 minutes and 52 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
passed #42205
test_php7.0

00:02:28

passed #42206
test_php7.1

00:02:23