Use a password attribute in the parity_node resource

The mainnet and testnet nodes use data from an encrypted data bag

Also fix a bug with the resource (hardcoded "dev" name instead of the
name attribute)

data_bags/credentials/parity.json

@@ -0,0 +1,15 @@
+{
+  "id": "parity",
+  "testnet_password": {
+    "encrypted_data": "nPYzGCz9YkH7DyyYqEVzXMTK2Wim25jgP7NvO3epMR+J9Xu3vBG2kiQ6Wx0D\ngxM7\n",
+    "iv": "CuLNb2eNcBuoI1NuHf6j0g==\n",
+    "version": 1,
+    "cipher": "aes-256-cbc"
+  },
+  "mainnet_password": {
+    "encrypted_data": "PqmxQnvGKVEs0/YuZB1M2VO45Zk3Hqg9bXsgrX5wvM9bFXPjg9/xv7AK215d\n3FrZEFiV9PNyqbfjTcCpPkkdbDEvuJ8n/+mnFshEH+7+T+I=\n",
+    "iv": "HjNL7eKlDwWE37ZTVa62rA==\n",
+    "version": 1,
+    "cipher": "aes-256-cbc"
+  }
+}