[push] Define owner and ownerid on the server side.

[AcckiyGerman]

https://github.com/datahq/data-cli/blob/a0eb8458feb8cec5c0d62b2f676a7ecf0b939a0e/bin/data-push.js#L90

const datahubConfigs = {
      token: config.get('token'),
      ...
      ownerid: config.get('profile') ? config.get('profile').id : config.get('id'),
      owner: config.get('profile') ? config.get('profile').username : config.get('username')
    }

I tried to provide fake ownerid or owner from some other user and I've got

• fake ownerid results to the 'UNAUTHORISED' response from the server
• fake owner field does not affect on the server - resulting package owner are always correct

It looks like the server is secured. But anyway the owner and ownerid info could be inferred on the server-side (and it does happen when server do security check), so let's do it there and remove this code as redundant in the data-cli.

Tasks

• [ ] change the server-side code to infer the ownerid from the token
• [ ] remove owner and ownerid setup from the client code.

Related issues

https://github.com/datahq/data-cli/issues/233