Move to apt_mirantis repo

   * repo.ubuntu => repo.mcp.apt_mirantis.ubuntu

Change-Id: If279fdb5d387af1d9521377fce126bcb56ba55ef
diff --git a/classes/cluster/ceph-ha/infra/init.yml b/classes/cluster/ceph-ha/infra/init.yml
index 3c13d80..a93dccc 100644
--- a/classes/cluster/ceph-ha/infra/init.yml
+++ b/classes/cluster/ceph-ha/infra/init.yml
@@ -3,7 +3,7 @@
 - system.linux.system.repo.mcp.extra
 - system.linux.system.repo.mcp.salt #FIXME
 - system.linux.system.repo.saltstack.xenial
-- system.linux.system.repo.ubuntu
+- system.linux.system.repo.mcp.apt_mirantis.ubuntu
 - system.openssh.server.team.all
 - cluster.ceph-ha.ceph
 - cluster.overrides