Added context to contributor/liveblog updates

MAPI-529
This is fine, but FYI, scalatest has a really nice mixin for working with Options, called `OptionValues`. You can just call `.value` and you'll get a nice helpful test error if it's a `None`. If you had the trait included, you could write:

    NotificationBuilderHelpers.followableTag(content).map(_.webTitle).value should equal("Ignacio Funk")

Doesn't make too much difference here but it's useful to know about.