Deleting deprecated function and switch test to 2017.7

The patch deletes deprecated cmd.run function which actually
was defined in salt 2016 as alias for cmd.shell therefore this
change supports backward compatibility.

Change-Id: I47eae0b8ee45ca1a1a9b3e8e544c893614573fda
Related-PROD: 17056
diff --git a/.kitchen.yml b/.kitchen.yml
index 379123c..fe8de71 100644
--- a/.kitchen.yml
+++ b/.kitchen.yml
@@ -8,7 +8,7 @@
   name: salt_solo
   salt_install: bootstrap
   salt_bootstrap_url: https://bootstrap.saltstack.com
-  salt_version: latest
+  salt_version: <%=ENV['SALT_VERSION'] || 'latest'%>
   salt_minion_id: salt.ci.local
   require_chef: false
   log_level: error