Switch virtual labs to Salt 2017.7

Change-Id: I2c08014f08cc08ed3cd869adc186974f11c6d313
diff --git a/classes/cluster/virtual-mcp11-k8s-contrail/opencontrail/control.yml b/classes/cluster/virtual-mcp11-k8s-contrail/opencontrail/control.yml
index 0945af2..a7249b1 100644
--- a/classes/cluster/virtual-mcp11-k8s-contrail/opencontrail/control.yml
+++ b/classes/cluster/virtual-mcp11-k8s-contrail/opencontrail/control.yml
@@ -4,7 +4,7 @@
 - system.linux.system.repo.mcp.openstack
 - system.linux.system.repo.mcp.extra
 - system.linux.system.repo.mcp.apt_mirantis.cassandra
-- system.linux.system.repo.mcp.apt_mirantis.saltstack_2016_3
+- system.linux.system.repo.mcp.apt_mirantis.saltstack
 - system.opencontrail.client.resource.edge_router
 - system.rabbitmq.server.cluster
 - system.opencontrail.control.cluster