Refactor Notifier::Sidekiq , extracting to #sidekiq_job and logging.
Refactor Notifier::Sidekiq , extracting to #sidekiq_job and logging.

Extract Sidekiq job payload to `Notifier::Sidekiq#sidekiq_job`. Add
`SIDEKIQ_KEY_QUEUES`,`SIDEKIQ_KEY_QUEUE_X` extractions of Redis key
constants. Add logging.

Note that `App#notifiers` already attached `:logger`, although it
previously had no effect because `Notifier::Sidekiq` did not log.

tiredpixel/ryespy