Use a custom resource to create a 389 Directory Server instance

This replaces the default recipe and will make it much easier to create
other types of instances, for example for replication

data_bags/credentials/dirsrv.json

@@ -0,0 +1,10 @@
+{
+  "id": "dirsrv",
+  "admin_password": {
+    "encrypted_data": "i71l5E129mXCcDAyME8sNMUkYUlQMgt7Eh6noyFcLNgbaMo=\n",
+    "iv": "KNW2B8tpX7ywZwbg\n",
+    "auth_tag": "GawQ+FSlA5v5YVyryeUxng==\n",
+    "version": 3,
+    "cipher": "aes-256-gcm"
+  }
+}