Handle case for international SMS - use correct phone validator, and also set status correctly.

This relies on some other code so this commit has placeholder failing tests to be populated when other PRs are merged.

tests/app/delivery/test_send_to_providers.py

@@ -474,6 +474,7 @@ def test_should_update_billable_units_according_to_research_mode_and_key_type(no
     assert sample_notification.billable_units == billable_units
 
 
+<<<<<<< HEAD
 def test_should_send_sms_to_international_providers(
     restore_provider_details,
     sample_sms_template_with_html,
@@ -530,3 +531,11 @@ def test_should_send_sms_to_international_providers(
     assert notification_uk.sent_by == 'firetext'
     assert notification_int.status == 'sending'
     assert notification_int.sent_by == 'mmg'
+
+
+def test_should_send_international_sms_with_formatted_phone_number():
+    assert 1 == 2
+
+
+def test_should_set_international_phone_number_to_sent_status():
+    assert 1 == 2