Use dynamic mined /etc/hosts records instead of static definitions.

Fixes - PROD-14120

Change-Id: I68ead122c4a59322a8b2d985b4cf307737ec2306
diff --git a/classes/cluster/os-ha-contrail-40/init.yml b/classes/cluster/os-ha-contrail-40/init.yml
index b7c1997..7947dac 100644
--- a/classes/cluster/os-ha-contrail-40/init.yml
+++ b/classes/cluster/os-ha-contrail-40/init.yml
@@ -1,4 +1,5 @@
 classes:
+- system.linux.network.dynamic_hosts
 - system.linux.system.repo.mcp.extra
 - system.linux.system.single
 - system.rsyslog.client.single