Run lock timeout configurable

[Slania]

class ConfigurableRunLockTimeoutWorker
  include Sidekiq::Worker
  sidekiq_options :queue => 'background', :run_lock_expiration => 60 * 3
end

[Slania]

We use sidekiq jobs to do things like send out emails through slow APIs. With batching on our end, their end, XML processing etc., it is actually very common for some of our workers to take a couple of minutes or more to send out a large batch (~4000) of emails.

Right now, the run_lock is hardcoded to expire in 60seconds unless the lease is renewed. This PR makes it possible to configure the expiration time.

[Slania]

@mhenrixon thoughts?

[mhenrixon]

Still thinking about this but maybe default_queue_expiration and default_run_expiration would suffice. We already know it is expiration of a lock so it feels redundant. On the other hand it is very explicit. What do you think?

[mhenrixon]

Good job, had some feedback for you @Slania. Good thinking with the naming of the lock_expiration and the default_lock_expiration. 👍

[Slania]

@mhenrixon I think I have it. I used the same file for all 3 calculators just because it made sense to keep them close together and the file itself is relatively small. However, they each have their own specs though. Inheritance did make the testing a lot easier and more terse! :)