Vendor the external cookbooks

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

cookbooks/mysql/templates/default/systemd/mysqld.service.erb

@@ -0,0 +1,16 @@
+[Unit]
+Description=mysql_service[mysql-<%= @config.instance %>]
+After=syslog.target
+After=network.target
+
+[Service]
+Type=simple
+User=<%= @config.run_user %>
+Group=<%= @config.run_group %>
+ExecStart=<%= @mysqld_bin %> --defaults-file=<%= @etc_dir %>/my.cnf --basedir=<%= @base_dir %>
+ExecStartPost=/usr/libexec/mysql-<%= @config.instance %>-wait-ready $MAINPID
+TimeoutSec=300
+PrivateTmp=true
+
+[Install]
+WantedBy=multi-user.target