Vendor the external cookbooks

Knife-Zero doesn't include Berkshelf support, so vendoring everything in
the repo is convenient again

cookbooks/redis/files/default/tests/minitest/client_test.rb

@@ -0,0 +1,7 @@
+require_relative "test_helper"
+
+describe_recipe "redis::client" do
+  it "installed the `redis-tools` package" do
+    package("redis-tools").must_be_installed
+  end
+end