fix(@embark/deployment): fix undefined in nb arguments in deploy

This is caused by web3 using the method name to show which method
doesn't have the right number of arguments, but the constructor does
not have a name

packages/plugins/ethereum-blockchain-client/src/index.js

@@ -59,6 +59,16 @@ class EthereumBlockchainClient {
       const web3 = await this.web3;
       const [account] = await web3.eth.getAccounts();
       const contractObj = new web3.eth.Contract(contract.abiDefinition, contract.address);
+      contractObj._jsonInterface.find(obj => {
+        if (obj.type === 'constructor') {
+          if (!obj.name) {
+            // Add constructor as the name of the method, because if there is an error, it prints `undefined` otherwise
+            obj.name = 'constructor';
+          }
+          return true;
+        }
+        return false;
+      });
       const code = contract.code.substring(0, 2) === '0x' ? contract.code : "0x" + contract.code;
       const contractObject = contractObj.deploy({arguments: (contract.args || []), data: code});
       if (contract.gas === 'auto' || !contract.gas) {