Setting listen_default_ports to False

The patch sets listen_default_ports parameter to False to not
to listen 0.0.0.0:443 by apache bacause of the fact that haproxy
servers connection from 443 port for horizon.

Related-PROD: PROD-25582
Change-Id: I7f77fe27f5ce0b3cb6f4b5392d4d77f91f02473e
diff --git a/apache/server/site/horizon.yml b/apache/server/site/horizon.yml
index 4cf7820..5cfca1e 100644
--- a/apache/server/site/horizon.yml
+++ b/apache/server/site/horizon.yml
@@ -7,6 +7,8 @@
     apache_horizon_api_host: ${linux:network:fqdn}
   apache:
     server:
+      bind:
+        listen_default_ports: false
       enabled: true
       default_mpm: event
       modules: