send notifications via email

Provide default configuration to send
alertmanager notifications to all receivers
including SMTP server.

PROD-18781

Change-Id: I299fbbee294e5c02a11c2746bccf4c8fe788e310
diff --git a/prometheus/alertmanager/notification/pushkin.yml b/prometheus/alertmanager/notification/pushkin.yml
index a78b6fd..151801b 100644
--- a/prometheus/alertmanager/notification/pushkin.yml
+++ b/prometheus/alertmanager/notification/pushkin.yml
@@ -1,10 +1,10 @@
 parameters:
-    _param:
-      alertmanager_notification_pushkin_host: ${_param:haproxy_pushkin_bind_host}
-      alertmanager_notification_pushkin_port: ${_param:haproxy_pushkin_bind_port}
-parameters:
+  _param:
+    alertmanager_notification_pushkin_host: ${_param:haproxy_pushkin_bind_host}
+    alertmanager_notification_pushkin_port: ${_param:haproxy_pushkin_bind_port}
   prometheus:
     alertmanager:
+      enabled: true
       config:
         route:
           routes: