Add endpoint to get the email reply to addresses for a service

- Changed the dao_get_reply_to_by_service_id method to return a list of
results.
- Added a GET /service/<service_id>/email-reply-to endpoint

app/service/rest.py

@@ -46,7 +46,7 @@ from app.dao.service_whitelist_dao import (
     dao_add_and_commit_whitelisted_contacts,
     dao_remove_service_whitelist
 )
-from app.dao.service_email_reply_to_dao import create_or_update_email_reply_to
+from app.dao.service_email_reply_to_dao import create_or_update_email_reply_to, dao_get_reply_to_by_service_id
 from app.dao.provider_statistics_dao import get_fragment_count
 from app.dao.users_dao import get_user_by_id
 from app.errors import (
@@ -523,6 +523,12 @@ def create_one_off_notification(service_id):
     return jsonify(resp), 201
 
 
+@service_blueprint.route('/<uuid:service_id>/email-reply-to', methods=["GET"])
+def get_email_reply_to_addresses(service_id):
+    result = dao_get_reply_to_by_service_id(service_id)
+    return jsonify([i.serialize() for i in result]), 200
+
+
 @service_blueprint.route('/unique', methods=["GET"])
 def is_service_name_unique():
     name, email_from = check_request_args(request)