Switch virtual labs to Salt 2017.7

Change-Id: I2c08014f08cc08ed3cd869adc186974f11c6d313
diff --git a/classes/cluster/virtual-offline-ssl/init.yml b/classes/cluster/virtual-offline-ssl/init.yml
index fb3c853..642429d 100644
--- a/classes/cluster/virtual-offline-ssl/init.yml
+++ b/classes/cluster/virtual-offline-ssl/init.yml
@@ -1,7 +1,7 @@
 classes:
 - system.linux.network.dynamic_hosts
 - system.linux.system.repo_local.mcp.extra
-- system.linux.system.repo_local.mcp.apt_mirantis.saltstack_2016_3
+- system.linux.system.repo_local.mcp.apt_mirantis.saltstack
 - system.linux.system.repo_local.mcp.apt_mirantis.ubuntu
 - system.linux.system.single
 - system.linux.system.single.debian