message: add latest config for CI deployment
  Summary:
  Reviewers: kevin, ron
  Subscribers: ben
diff: @@ -85,6 +85,18 @@ exports.Environments = {
  serverXpub: 'xpub661MyMwAqRbcErFqVXGiUFv9YeoPbhN72UiNCUdj9nj3T6M8h7iKNmbCYpMVWVZP7LA2ma3HWcPngz1gRTm4FPdtm9mHfrNvU93MCoszsGL',
  blockrApiBaseUrl: 'https://tbtc.blockr.io/api/v1'
  },
  + latest: {
  + uri: 'https://latest.bitgo.com',
  + networks: {
  + tbtc: bitcoin.networks.testnet
  + },
  + network: 'testnet',
  + ethNetwork: 'ethereum',
  + rmgNetwork: 'rmgTest',
  + signingAddress: 'msignBdFXteehDEgB6DNm7npRt7AcEZJP3',
  + serverXpub: 'xpub661MyMwAqRbcErFqVXGiUFv9YeoPbhN72UiNCUdj9nj3T6M8h7iKNmbCYpMVWVZP7LA2ma3HWcPngz1gRTm4FPdtm9mHfrNvU93MCoszsGL',
  + blockrApiBaseUrl: 'https://tbtc.blockr.io/api/v1'
  + },
  rmgDev: {
  uri: 'https://rmgwebdev.bitgo.com',
  networks: {
  