Switch virtual labs to Salt 2017.7

Change-Id: I2c08014f08cc08ed3cd869adc186974f11c6d313
diff --git a/classes/cluster/virtual-mcp-pike-ovs/openstack/dashboard.yml b/classes/cluster/virtual-mcp-pike-ovs/openstack/dashboard.yml
index e13f6c8..3bbe90f 100644
--- a/classes/cluster/virtual-mcp-pike-ovs/openstack/dashboard.yml
+++ b/classes/cluster/virtual-mcp-pike-ovs/openstack/dashboard.yml
@@ -2,7 +2,7 @@
 - system.linux.system.repo.mcp.apt_mirantis.ubuntu
 - system.linux.system.repo.mcp.apt_mirantis.openstack
 - system.linux.system.repo.mcp.extra
-- system.linux.system.repo.mcp.apt_mirantis.saltstack_2016_3
+- system.linux.system.repo.mcp.apt_mirantis.saltstack
 - system.horizon.server.single
 - cluster.virtual-mcp-pike-ovs
 parameters: