Replace deprecated toml configs with json (ChainSafe#695)

Author: waymobetta

scripts/configs/config1.json

@@ -0,0 +1,29 @@
+{
+    "chains": [
+        {
+            "name": "eth",
+            "type": "ethereum",
+            "id": "0",
+            "endpoint": "ws://localhost:8545",
+            "from": "0xA3d69D9A1BD03cAE65f15C0a453bb716d8912f10",
+            "opts": {
+                "bridge": "0x62877dDCd49aD22f5eDfc6ac108e9a4b5D2bD88B",
+                "erc20Handler": "0x3167776db165D8eA0f51790CA2bbf44Db5105ADF",
+                "erc721Handler": "0x3f709398808af36ADBA86ACC617FeB7F5B7B193E",
+                "genericHandler": "0x2B6Ab4b880A45a07d83Cf4d664Df4Ab85705Bc07",
+                "gasLimit": "1000000",
+                "maxGasPrice": "20000000"
+            }
+        },
+        {
+            "name": "sub",
+            "type": "substrate",
+            "id": "1",
+            "endpoint": "ws://localhost:9944",
+            "from": "5fe3qieCV3GJu2n7F8uGKZCjPiMZaATzEo8Czu9eKuLUBfjK",
+            "opts": {
+                "useExtendedCall": "true"
+            }
+        }
+    ]
+}