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: I0de61b64d4c6b9fd8926cc9ce8fe7566153fe451
Related-PROD: 17056
diff --git a/.kitchen.yml b/.kitchen.yml
index 01c5fda..0c77d2e 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'%>
   require_chef: false
   log_level: error
   formula: cinder