Dockerfile, raiden: Raiden upgraded to master@62f3138.

[cryptomental]

The Raiden after v0.3.0 release requires Python3.6+ Upgrade Docker image to Ubuntu 18.04 LTS with Python 3.6.

Upgrade Raiden submodule to master@62f3138

I tested it all manually:

> { partner_address: '0xd3F0cfda2Fb1251cc6Bb9cE5beA925824056Fc38',
  channel_address: '0xb149a458d4D1CD27AEa4211C0caf8a9701DF8905',
  state: 'closed',
  token_address: '0x72641d3657375676C326324d6166e0E3cbA38bcE',
  settle_timeout: 30,
  reveal_timeout: 10,
  balance: 50 }

...

> token.balanceOf(acct0).then(console.log)
Promise {
  <pending>,
  domain: 
   Domain {
     domain: null,
     _events: 
      { removeListener: [Function: updateExceptionCapture],
        newListener: [Function: updateExceptionCapture],
        error: [Function: debugDomainError] },
     _eventsCount: 3,
     _maxListeners: undefined,
     members

> 249950