Harvest: add option to submit the week after sending the worklogs

[AlphaGit]

This would allow certain configurations to also submit a timesheet after the worklogs had been submitted.

For example, the system could be called all week with a cron job like this:

node start.js -c daily_configuration.json

But on Friday, after submitting the day's worklogs, it could submit the week:

node start.js -c daily_configuration_with_submit.json

{
    "type": "Harvest",
    "token": "string",
    "accountId": "string",
    "submit": true
}

This could also work if we had a way to override particular configuration parameters in the command line:

node start.js -c daily_configuration.json -co 'outputs[0].submit="true"'

[AlphaGit]

The Harvest team pointed out that there is currently no API for the submissions to happen in a programatic way. They did not give any specifics on the roadmap on when it would be included, if ever.