Put the inbound number on the invite page

Inbound number and SMS sender are divorced from each other now. This
page was assuming that they were the same thing.

app/main/views/service_settings.py

@@ -394,6 +394,7 @@ def service_set_international_sms(service_id):
 def service_set_inbound_sms(service_id):
     return render_template(
         'views/service-settings/set-inbound-sms.html',
+        inbound_number=inbound_number_client.get_inbound_sms_number_for_service(service_id)['data']['number'],
     )
 
 

app/templates/views/service-settings/set-inbound-sms.html

@@ -13,7 +13,7 @@
       <h1 class="heading-large">Receive text messages</h1>
       {% if 'inbound_sms' in current_service.permissions %}
         <p>
-          Your service can receive text messages sent to {{ current_service.sms_sender }}.
+          Your service can receive text messages sent to {{ inbound_number }}.
         </p>
         <p>
           If you want to turn this feature off,

tests/app/main/views/test_service_settings.py

@@ -1311,13 +1311,21 @@ def test_cant_resume_active_service(
             'feature.'
         )
     ),
+    (
+        'main.service_set_inbound_sms',
+        (
+            'Your service can receive text messages sent to 0781239871.'
+        )
+    ),
 ])
 def test_invitation_pages(
     logged_in_client,
     service_one,
     endpoint,
     expected_p,
+    mock_get_inbound_number_for_service,
 ):
+    service_one['permissions'] = ['sms', 'email', 'inbound_sms']
     response = logged_in_client.get(url_for(endpoint, service_id=service_one['id']))
 
     assert response.status_code == 200