[base] Use `kitchen verify all`, rather than `kitchen test`.

```
diff --git a/tasks/tests/ci.rake b/tasks/tests/ci.rake
index d69e04b..931d7e7 100755
--- a/tasks/tests/ci.rake
+++ b/tasks/tests/ci.rake
@@ -11,7 +11,7 @@ task :test do

     cd "site-cookbooks/#{cookbook}/" do

-      sh "bundle ex kitchen test --concurrency=2 --destroy=always"
+      sh "bundle ex kitchen verify all --concurrency=2 --destroy=always"

     end
   end
```