Refresh ceph repo

Change-Id: Idead218467812560443987af140c5c8909314790
Closes-Bug: PROD-21814 (PROD:21814)
Related-Bug: PROD-21071 (PROD:21071)
diff --git a/defaults/linux_system_repo.yml b/defaults/linux_system_repo.yml
index 435f38e..f3939db 100644
--- a/defaults/linux_system_repo.yml
+++ b/defaults/linux_system_repo.yml
@@ -10,6 +10,7 @@
     # Per repos
     linux_system_repo_mcp_aptly_url: ${_param:linux_system_repo_url}/aptly/
     linux_system_repo_mcp_cassandra_url: ${_param:linux_system_repo_url}/cassandra/
+    linux_system_repo_mcp_ceph_url: ${_param:linux_system_repo_url}/ceph-${_param:linux_system_repo_mcp_ceph_codename}/
     linux_system_repo_mcp_docker_legacy_url: ${_param:linux_system_repo_url}/docker-1.x/
     linux_system_repo_mcp_docker_url: ${_param:linux_system_repo_url}/docker/
     linux_system_repo_mcp_elasticsearch_curator_url: ${_param:linux_system_repo_url}/elasticsearch-curator-5/
@@ -35,4 +36,4 @@
     linux_system_repo_mcp_cassandra_version: '21x'
     linux_system_repo_mcp_glusterfs_version_number: "3.8"
     linux_system_repo_mcp_saltstack_version_number: "${_param:salt_version}"
-    linux_system_repo_mcp_ceph_codename: 'luminous'
+    linux_system_repo_mcp_ceph_codename: luminous