Setup Gateways for token

[abhayks1]

• It will deploy contracts to setup gateways for an EIP20 token.

• Deployer addresses in both chains should be unlocked.

• It will populate token-config and write file in .mosaic directory. Proposed path:

.mosaic/<origin-chain>/<aux-chain-id>/token-config.json

e.g.

.mosaic/ropsten/1406/wETH.json

• -deploy-libraries is an optional argument needed to deploy library contracts. If it's passed, it should deploy MessageBus, GatewayLib and MPP library contracts. It not passed library contracts should not be deployed.

• if --mosaic-config argument is given then library contracts should be read from the mosaicConfigPath.

• Any of --mosaic-config or -deploy-libraries is mandatory. Validation error should be thrown id both passed.

• Make sure proper validations are in place for the arguments.

• Proposed command:

./mosaic setup-gateways <origin-chain-name> <auxiliary-chain-id> <origin-gethendpoint> <auxiliary-gethendpoint> <initConfigPath> --mosaic-config <mosaicConfigPath> -deploy-libraries

• Init config could look like below:

            {
            "originTxOptions": {
                "from": "0x7b829edc5d894bdc00a8d1717c90e9f369f41a18",
                "gasPrice": 3000000000
            },
            "auxiliaryTxOptions": {
                "from": "0x7b829edc5d894bdc00a8d1717c90e9f369f41a18",
                "gasPrice": 4000000
            },
            "originBounty": "10",
            "auxiliaryBounty": "10",
            "originValueTokenAddress": "0x325f05a75999347b7d8461BaEf274afAE0B8AE1c",
            "originBaseTokenAddress": "0x325f05a75999347b7d8461BaEf274afAE0B8AE1c",
            "originBurnerAddress": "0x0000000000000000000000000000000000000000",
            "auxiliaryBurnerAddress": "0x0000000000000000000000000000000000000000",
            "originGatewayOrganizationOwner": "0x4bdc7ED91924d23B8F8cD4f3AEA854a2555e506D",
            "auxiliaryCoGatewayAndUtilityTokenOrganizationOwner": "0xcB8F6c8eBAD6F81fa0A3B956057551a259601A58"
        }

• Integration test for setup gateway

- Update readme

- Publish existing token configs from the repo based on originChain, auxChainId and gateway address.

[abhayks1]

token-config name should be gateway address. It's unique.
Token Symbol can't be name of token-config since it's not unique. There can be multiple gateways for same token symbol.
e.g. 0xae02c7b1c324a8d94a564bc8d713df89eae441fe.json