Use `genesis_tx` parameter in `generate_genesis_block`. #3261

* src/cryptnote_config.h: The constant `config::testnet::GENESIS_TX` was
changed to be the same as `config::GENESIS_TX` (the mainnet's transaction)
because the mainnet's transaction was being used for both networks.

* src/cryptonote_core/cryptonote_tx_utils.cpp: The `generate_genesis_block` function
was ignoring the  `genesis_tx` parameter, and instead it was using the `config::GENESIS_TX`
constant. That's why the testnet genesis transaction was changed. Also five lines of unused
code were removed.

Signed-off-by: Jean Pierre Dudey <jeandudey@hotmail.com>

src/cryptonote_config.h

@@ -172,7 +172,7 @@ namespace config
     boost::uuids::uuid const NETWORK_ID = { {
         0x12 ,0x30, 0xF1, 0x71 , 0x61, 0x04 , 0x41, 0x61, 0x17, 0x31, 0x00, 0x82, 0x16, 0xA1, 0xA1, 0x11
       } }; // Bender's daydream
-    std::string const GENESIS_TX = "013c01ff0001ffffffffffff0f029b2e4c0281c0b02e7c53291a94d1d0cbff8883f8024f5142ee494ffbbd0880712101168d0c4ca86fb55a4cf6a36d31431be1c53a3bd7411bb24e8832410289fa6f3b";
+    std::string const GENESIS_TX = "013c01ff0001ffffffffffff03029b2e4c0281c0b02e7c53291a94d1d0cbff8883f8024f5142ee494ffbbd08807121017767aafcde9be00dcfd098715ebcf7f410daebc582fda69d24a28e9d0bc890d1";
     uint32_t const GENESIS_NONCE = 10001;
   }
 }

src/cryptonote_core/cryptonote_tx_utils.cpp

@@ -639,17 +639,8 @@ namespace cryptonote
     //genesis block
     bl = boost::value_initialized<block>();
 
-
-    account_public_address ac = boost::value_initialized<account_public_address>();
-    std::vector<size_t> sz;
-    construct_miner_tx(0, 0, 0, 0, 0, ac, bl.miner_tx); // zero fee in genesis
-    blobdata txb = tx_to_blob(bl.miner_tx);
-    std::string hex_tx_represent = string_tools::buff_to_hex_nodelimer(txb);
-
-    std::string genesis_coinbase_tx_hex = config::GENESIS_TX;
-
     blobdata tx_bl;
-    bool r = string_tools::parse_hexstr_to_binbuff(genesis_coinbase_tx_hex, tx_bl);
+    bool r = string_tools::parse_hexstr_to_binbuff(genesis_tx, tx_bl);
     CHECK_AND_ASSERT_MES(r, false, "failed to parse coinbase tx from hard coded blob");
     r = parse_and_validate_tx_from_blob(tx_bl, bl.miner_tx);
     CHECK_AND_ASSERT_MES(r, false, "failed to parse coinbase tx from hard coded blob");