Add purge apport on cmp nodes

Change-Id: I4a1ceb283b1c430cbc6795ef9310f60122226f18
diff --git a/classes/cluster/k8s-ha-contrail-40/opencontrail/compute.yml b/classes/cluster/k8s-ha-contrail-40/opencontrail/compute.yml
index 913d24a..5ff2932 100644
--- a/classes/cluster/k8s-ha-contrail-40/opencontrail/compute.yml
+++ b/classes/cluster/k8s-ha-contrail-40/opencontrail/compute.yml
@@ -35,4 +35,10 @@
     network:
       concat_iface_files:
       - src: '/etc/network/interfaces.d/50-cloud-init.cfg'
-        dst: '/etc/network/interfaces'
\ No newline at end of file
+        dst: '/etc/network/interfaces'
+    system:
+      autoupdates:
+        enabled: false
+      package:
+        apport: # fix conflict with contrail-vrouter-agent explicitly
+          version: purged