add sending_vehicle argument to sns send_sms (#2226)

Author: sastels

app/clients/sms/aws_sns.py

@@ -26,7 +26,7 @@ def get_name(self):
         return self.name
 
     @statsd(namespace="clients.sns")
-    def send_sms(self, to, content, reference, multi=True, sender=None, template_id=None, service_id=None):
+    def send_sms(self, to, content, reference, multi=True, sender=None, template_id=None, service_id=None, sending_vehicle=None):
         matched = False
 
         for match in phonenumbers.PhoneNumberMatcher(to, "US"):