Add a new "force CLI" checkbox to the add pbx seat form.
If the checkbox is ticked, "?create_primary_acli=false" is
added to the request URL params when creating a subscriber.
Removes customer_id params from createSubscriber() as it
seems to be a leftover from old code.
Change-Id: I58e287030bc740659415f888d8ed42f5ab6894d1