Rename bitcoin and ethereum config json files.

It is necessary to clear the internal state in DB after coin rename:
ldb --db=<datadir> --column_family=default delete internalState

configs/bitcoin.json

@@ -1,4 +1,5 @@
 {
+  "coin_name": "Bitcoin",
   "rpcURL": "http://127.0.0.1:8030",
   "rpcUser": "rpc",
   "rpcPass": "rpc",
@@ -8,4 +9,4 @@
   "mempoolWorkers": 8,
   "mempoolSubWorkers": 2,
   "blockAddressesToKeep": 300
-}
+}

configs/bitcoin_testnet.json

@@ -1,4 +1,5 @@
 {
+  "coin_name": "Testnet",
   "rpcURL": "http://localhost:18030",
   "rpcUser": "rpc",
   "rpcPass": "rpc",
@@ -8,4 +9,4 @@
   "mempoolWorkers": 8,
   "mempoolSubWorkers": 2,
   "blockAddressesToKeep": 300
-}
+}

configs/ethererum_testnet_ropsten.json

@@ -1,4 +1,5 @@
 {
+  "coin_name": "Ethereum Testnet Ropsten",
   "rpcURL": "ws://localhost:18036",
   "rpcTimeout": 25
 }

configs/ethereum.json

@@ -1,4 +1,5 @@
 {
+  "coin_name": "Ethereum",
   "rpcURL": "ws://localhost:8036",
   "rpcTimeout": 25
 }