hive: use HIVE_NETWORK_ID to initialize networkId if available

devp2p/eth simulator is using this HIVE_NETWORK_ID to configure client

hive_integration/nimbus/nimbus.sh

@@ -13,6 +13,7 @@
 #
 #  - [x] HIVE_BOOTNODE                enode URL of the remote bootstrap node
 #  - [x] HIVE_NETWORK_ID              network ID number to use for the eth protocol
+#  - [x] HIVE_CHAIN_ID                chain ID is used in transaction signature process
 #  - [ ] HIVE_TESTNET                 whether testnet nonces (2^20) are needed
 #  - [ ] HIVE_NODETYPE                sync and pruning selector (archive, full, light)
 #
@@ -58,6 +59,10 @@ if [ "$HIVE_BOOTNODE" != "" ]; then
   FLAGS="$FLAGS --bootnodes:$HIVE_BOOTNODE"
 fi
 
+if [ "$HIVE_NETWORK_ID" != "" ]; then
+  FLAGS="$FLAGS --networkid:$HIVE_NETWORK_ID"
+fi
+
 # Configure the genesis chain and use it as start block and dump it to stdout
 echo "Supplied genesis state:"
 jq -f /mapper.jq /genesis.json | tee /genesis-start.json