Name the thread pools

[sj26]

Before, threads had names like "worker-1" in Thread.list and friends, and Notifier could not be differentiated from Scheduler, or other concurrent-ruby ThreadPoolExecutor instances:

  Thread #<Thread:0x00007fee3fc4d418@worker-1 /usr/local/rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/concurrent-ruby-1.1.7/lib/concurrent-ruby/concurrent/executor/ruby_thread_pool_executor.rb:332 sleep> status=sleep priority=0
      /usr/local/rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/good_job-1.2.1/lib/good_job/notifier.rb:93:in `wait_for_notify'

Now, the class name is used as a default thread pool name, which is prefixes to worker names:

  Thread #<Thread:0x00007fee3fc4d418@GoodJob::Notifier-worker-1 /usr/local/rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/concurrent-ruby-1.1.7/lib/concurrent-ruby/concurrent/executor/ruby_thread_pool_executor.rb:332 sleep> status=sleep priority=0
      /usr/local/rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/good_job-1.2.1/lib/good_job/notifier.rb:93:in `wait_for_notify'

[bensheldon]

🎉 This is fantastic.

This is a more complex namer too here, but I like what you suggest here.

good_job/lib/good_job/scheduler.rb

Line 88 in ccff9a1

@pool_options[:name] = "GoodJob::Scheduler(queues=#{@performer.name} max_threads=#{@pool_options[:max_threads]} poll_interval=#{@timer_options[:execution_interval]})"