added system.linux.system.repo.mcp.salt where missing

Change-Id: Iec33efa97a7638437ddfe280ec3f2c69889e791f
diff --git a/classes/cluster/virtual-mcp-ocata-dvr/stacklight/server.yml b/classes/cluster/virtual-mcp-ocata-dvr/stacklight/server.yml
index 72d2b76..fffdcf4 100644
--- a/classes/cluster/virtual-mcp-ocata-dvr/stacklight/server.yml
+++ b/classes/cluster/virtual-mcp-ocata-dvr/stacklight/server.yml
@@ -4,6 +4,7 @@
 - system.linux.system.repo.mcp.salt
 - system.linux.system.repo.elasticsearch
 - system.linux.system.repo.kibana
+- system.linux.system.repo.docker
 - system.heka.remote_collector.container
 - system.heka.remote_collector.input.amqp
 - system.heka.remote_collector.output.elasticsearch