Add tokens for deployer and committer users

[alsotop]

Another couple of tokens that might be useful for commands would be the current deployer and committer. Not wanting to make too many tokens and make it messy, but perhaps {{ deployer_email }} {{ deployer_name }} {{ committer_email }} and {{ committer_name }}.

Example use case: we're using Rollbar, and we can notify Rollbar of a deploy being made by posting a webhook, and you can optionally provide the user who made the deploy.

[REBELinBLUE]

👍 Makes sense, I am away until next week so don't have a chance to do it but I will look early next week

[REBELinBLUE]

If a deployment is triggered via a webhook it is possible for the {{ deployer_name }} and {{ deployer_email }} to not have values.

What would you expect to happen in that case, blank values? The webhook can specify a name, so I guess {{ deployer_name }} would be the value specified via the hook otherwise webhook but not sure about email

[alsotop]

Hmm, that's a good point. Well I suppose either it should fall back to blank values, or we could instead replace with a token that represents a "deploy source" (or something worded better) - and then either that is "webhook" or the username?

[REBELinBLUE]

Fixed in e8c7a6a