Capsule default weights

[Exterm1nate]

This PR fixes wrong weights value of Sidekiq process with implicit queues list.

If you do not provide queues in configuration explicitly, the default Sidekiq capsule initializes with default queue, but the weights stays nil, so the process's weights is [nil] instead of [{"default"=>0}] with explicit queues configuration. And it breaks Sidekiq web UI busy tab.

Explicit queues list:

# In config
sidekiq = Sidekiq.configure_embed do |config|
  config.queues = %w[default]
  config.concurrency = 2
end

# In Rails console
Sidekiq::ProcessSet.new.to_a
# => [#<Sidekiq::Process @attribs={..., "queues"=>["default"], "weights"=>[{"default"=>0}], ...}>, ...]

Implicit queues list:

# In config
sidekiq = Sidekiq.configure_embed do |config|
  config.concurrency = 2
end

# In Rails console
Sidekiq::ProcessSet.new.to_a
# => [#<Sidekiq::Process @attribs={..., "queues"=>["default"], "weights"=>[nil], ...}>, ...]

[mperham]

The default weight for any queue which is not given a weight should be 1, not 0?

[mperham]

Oh never mind, that would turn strict priority into random weighting.