integration: add totalDifficulty for eth_getBlockBy[Number][Hash] pre merge (#282)

Author: lupin012

integration/mainnet/eth_getBlockByHash/test_10.json

@@ -0,0 +1,42 @@
+[
+    {
+        "test": {
+           "reference": "https://etherscan.io/block/0",
+           "description": "block 0" 
+        },
+        "request":{
+            "jsonrpc":"2.0",
+            "method":"eth_getBlockByHash",
+            "params":["0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3", false],
+            "id":1
+        },
+        "response":{
+            "jsonrpc":"2.0",
+            "id":1,
+           "result:":  {
+   "difficulty": "0x400000000",
+    "extraData": "0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa",
+    "gasLimit": "0x1388",
+    "gasUsed": "0x0",
+    "hash": "0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3",
+    "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+    "miner": "0x0000000000000000000000000000000000000000",
+    "mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+    "nonce": "0x0000000000000042",
+    "number": "0x0",
+    "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+    "receiptsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
+    "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
+    "size": "0x21c",
+    "stateRoot": "0xd7f8974fb5ac78d9ac099b9ad5018bedc2ce0a72dad1827a1709da30580f0544",
+    "timestamp": "0x0",
+    "totalDifficulty": "0x400000000",
+    "transactions": [],
+    "transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
+    "uncles": [] 
+}
+ 
+      }
+    }
+]
+

integration/mainnet/eth_getBlockByNumber/test_12.json

@@ -27,6 +27,7 @@
           "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
           "receiptsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
           "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
+          "totalDifficulty": "0x400000000",
           "size": "0x21c",
           "stateRoot": "0xd7f8974fb5ac78d9ac099b9ad5018bedc2ce0a72dad1827a1709da30580f0544",
           "timestamp": "0x0",