OpenSSH tweaks

Change-Id: I17e44eb91159e6780647c30e733687030173f13f
diff --git a/classes/cluster/os-ha-contrail-ironic/init.yml b/classes/cluster/os-ha-contrail-ironic/init.yml
index 84e12ce..bd90a75 100755
--- a/classes/cluster/os-ha-contrail-ironic/init.yml
+++ b/classes/cluster/os-ha-contrail-ironic/init.yml
@@ -9,3 +9,8 @@
 - cluster.os-ha-contrail-ironic.opencontrail
 - cluster.os-ha-contrail-ironic.openstack
 - cluster.overrides
+parameters:
+  openssh:
+    server:
+      alive:
+        interval: 0