Refresh OC cassandra repo

  * Remove cassandra repo from oc4 deployments -
    in oc4 cassandra inside docker containers.

Change-Id: I40a6106d1f45c6e4d1521b73a8c6a83dfc97fd18
diff --git a/classes/cluster/sl-k8s-contrail/opencontrail/control.yml b/classes/cluster/sl-k8s-contrail/opencontrail/control.yml
index 007dcd2..c8428be 100644
--- a/classes/cluster/sl-k8s-contrail/opencontrail/control.yml
+++ b/classes/cluster/sl-k8s-contrail/opencontrail/control.yml
@@ -1,6 +1,6 @@
 classes:
 - system.linux.system.lowmem
-- system.linux.system.repo.cassandra
+- system.linux.system.repo.mcp.apt_mirantis.cassandra
 - system.linux.system.repo.mcp.contrail
 - system.linux.system.repo.mcp.openstack
 - system.linux.system.repo.mcp.extra