Add saltstack rhel repos

Change-Id: I74c8f3e157b0db67b2e9f7ed217d3192b3593f99
diff --git a/linux/system/repo/saltstack/rhel6.yml b/linux/system/repo/saltstack/rhel6.yml
new file mode 100644
index 0000000..098410c
--- /dev/null
+++ b/linux/system/repo/saltstack/rhel6.yml
@@ -0,0 +1,6 @@
+classes:
+- system.linux.system.repo.saltstack.rhel
+parameters:
+  _param:
+    salt_version: 2016.3
+    rhel_releasever: 6