Send phone alerts before email alerts

Email alerts seem to be more problematic due to AWS SES rate
limiting and phone alerts are more important, so we should send
phone alerts first.

gracedb/alerts/main.py

@@ -69,12 +69,12 @@ def issue_alerts(event_or_superevent, alert_type, serialized_object,
     # Try to get label explicitly from kwargs
     label = kwargs.get('label', None)
 
-    # Issue email alerts
-    if settings.SEND_EMAIL_ALERTS and email_recipients.exists():
-        issue_email_alerts(event_or_superevent, alert_type, email_recipients,
-            label=label)
-
     # Issue phone alerts
     if settings.SEND_PHONE_ALERTS and phone_recipients.exists():
         issue_phone_alerts(event_or_superevent, alert_type, phone_recipients,
             label=label)
+
+    # Issue email alerts
+    if settings.SEND_EMAIL_ALERTS and email_recipients.exists():
+        issue_email_alerts(event_or_superevent, alert_type, email_recipients,
+            label=label)