Send transaction cost to factory deployer only if its balance is empty

[zguesmi]

in FactoryDeployer.js script, the factory deployer account is funded with some tokens to allow the deployment of the factory.

PoCo/utils/FactoryDeployer.js

Lines 26 to 31 in 8dc9ea3

	console.debug(`→ Factory is not yet deployed on this network`);
	await waitTx(
	wallet.sendTransaction({ to: FACTORY.deployer, value: FACTORY.cost }),
	);
	await waitTx(wallet.provider.sendTransaction(FACTORY.tx));
	console.debug(`→ Factory successfully deployed`);

With the current version, if the factory deployment tx fails funds are sent with every retry, which results in loosing funds of the sender account.

We need to add a control to only send funds if the deployer account is empty (or less than FACTORY.cost).