Set count as live to false for broadcast services

We think it would be a security risk to show the name of services
involved in emergency alerts as they be responsible for things such as
counter terrorism.

On top of that, showing broadcast services in the list of all services
could enable someone to use that information to try and trick an admin
into letting them access of a particular service given the fact they
know the name of it

tests/app/service/test_rest.py

@@ -3759,3 +3759,21 @@ def test_set_as_broadcast_service_maintains_broadcast_permission_for_existing_br
 
     permissions = ServicePermission.query.filter_by(service_id=sample_broadcast_service.id).all()
     assert [p.permission for p in permissions] == [BROADCAST_TYPE]
+
+
+def test_set_as_broadcast_service_sets_count_as_live_to_false(client, notify_db, sample_service):
+    assert sample_service.count_as_live == True
+
+    resp = client.post(
+        '/service/{}/set-as-broadcast-service'.format(sample_service.id),
+        data=json.dumps({
+            'broadcast_channel': "severe",
+        }),
+        headers=[('Content-Type', 'application/json'), create_authorization_header()]
+    )
+    result = resp.json
+    assert resp.status_code == 200
+    assert result['data']['count_as_live'] == False
+
+    service_from_db = Service.query.filter_by(id=sample_service.id).all()[0]
+    assert service_from_db.count_as_live == False