Portis Integration is always using testnet

[jessgusclark]

These lines should take the chainId and RPC Url from the configuration based on mainnet/testnet

rns-manager-react/src/app/rLogin/rLogin.js

Lines 23 to 24 in 12cd0de

	nodeUrl: 'https://public-node.testnet.rsk.co',
	chainId: 31,