Switch virtual labs to Salt 2017.7

Change-Id: I2c08014f08cc08ed3cd869adc186974f11c6d313
diff --git a/classes/cluster/virtual-mcp-pike-ovs/openstack/control.yml b/classes/cluster/virtual-mcp-pike-ovs/openstack/control.yml
index 1d044c0..fc73a24 100644
--- a/classes/cluster/virtual-mcp-pike-ovs/openstack/control.yml
+++ b/classes/cluster/virtual-mcp-pike-ovs/openstack/control.yml
@@ -3,7 +3,7 @@
 - system.linux.system.repo.mcp.apt_mirantis.glusterfs
 - 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.memcached.server.single
 - system.rabbitmq.server.cluster
 - system.rabbitmq.server.vhost.openstack