Fix 'virtual-mcp-ocata-cicd' model interpolation

After bump reclass-system model, interpolation is broken.

Change-Id: I64823cf6773dd6b69f8c787ae8e8e3f86f577106
diff --git a/classes/cluster/virtual-mcp-ocata-cicd/cicd/control/init.yml b/classes/cluster/virtual-mcp-ocata-cicd/cicd/control/init.yml
index 5bdbb9a..d9f86ab 100644
--- a/classes/cluster/virtual-mcp-ocata-cicd/cicd/control/init.yml
+++ b/classes/cluster/virtual-mcp-ocata-cicd/cicd/control/init.yml
@@ -244,6 +244,10 @@
     pushkin_db_user: pushkin
     pushkin_db_user_password: kRQaFJWiqhQfy6sN
     pushkin_db_host: ${_param:haproxy_postgresql_bind_host}
+    pushkin_smtp_host: 127.0.0.1
+    pushkin_smtp_port: 25
+    pushkin_email_sender_password: ''
+
     #..WebHook notification senders
     webhook_from: pushkin@example.com
     webhook_recipients: alerts@example.com