add new notification status 'sent'

for international text messages, when we may not ever receive callback info,
so we need a separate status that doesn't get timed out etc

app/config.py

@@ -187,7 +187,6 @@ class Development(Config):
     NOTIFY_ENVIRONMENT = 'development'
     NOTIFICATION_QUEUE_PREFIX = 'development'
     DEBUG = True
-    SQLALCHEMY_ECHO = False
     CELERY_QUEUES = Config.CELERY_QUEUES + [
         Queue('db-sms', Exchange('default'), routing_key='db-sms'),
         Queue('priority', Exchange('default'), routing_key='priority'),

app/models.py

@@ -572,6 +572,7 @@ class VerifyCode(db.Model):
 
 NOTIFICATION_CREATED = 'created'
 NOTIFICATION_SENDING = 'sending'
+NOTIFICATION_SENT = 'sent'
 NOTIFICATION_DELIVERED = 'delivered'
 NOTIFICATION_PENDING = 'pending'
 NOTIFICATION_FAILED = 'failed'
@@ -586,6 +587,7 @@ NOTIFICATION_STATUS_TYPES_FAILED = [
 ]
 
 NOTIFICATION_STATUS_TYPES_COMPLETED = [
+    NOTIFICATION_SENT,
     NOTIFICATION_DELIVERED,
     NOTIFICATION_FAILED,
     NOTIFICATION_TECHNICAL_FAILURE,
@@ -595,6 +597,7 @@ NOTIFICATION_STATUS_TYPES_COMPLETED = [
 
 NOTIFICATION_STATUS_TYPES_BILLABLE = [
     NOTIFICATION_SENDING,
+    NOTIFICATION_SENT,
     NOTIFICATION_DELIVERED,
     NOTIFICATION_FAILED,
     NOTIFICATION_TECHNICAL_FAILURE,
@@ -605,6 +608,7 @@ NOTIFICATION_STATUS_TYPES_BILLABLE = [
 NOTIFICATION_STATUS_TYPES = [
     NOTIFICATION_CREATED,
     NOTIFICATION_SENDING,
+    NOTIFICATION_SENT,
     NOTIFICATION_DELIVERED,
     NOTIFICATION_PENDING,
     NOTIFICATION_FAILED,