7.7.0 release (#692)

- 7.7.0 as default version
- 6.8.9 as 6.x tested version

Author: jmlrt

.kitchen.yml

@@ -19,7 +19,7 @@ provisioner:
     extra_vars:
       es_major_version: "<%= ENV['VERSION'] %>"
       <% if ENV['VERSION'] == '6.x' %>
-      es_version: '6.8.8'
+      es_version: '6.8.9'
       <% end %>
   <% end %>