Update aws-sdk 1.39.0 -> 1.40.0

Change-Id: I3480cfaa036ed4e7aa9b6b907ad9363485838a57
Update sidekiq 3.0.0 -> 3.0.2

3.0.2

  Revert gemfile requirement of Ruby 2.0. JRuby 1.7 calls itself Ruby
  1.9.3 and broke with this requirement.

3.0.1

  Revert pidfile behavior from 2.17.5: Sidekiq will no longer remove its
  own pidfile as this is a race condition when restarting.

  Show warning on the Queues page if a queue is paused

  Only activate the ActiveRecord middleware if ActiveRecord::Base is
  defined on boot.

  Add ability to disable jobs going to the DJQ with the dead option.
  sidekiq_options :dead => false, :retry => 5

  Minor fixes

Change-Id: I4f167f19e8eadda1a557f9e70d1e66f48cdae983
Update unicorn 4.8.2 -> 4.8.3

More information:

  https://www.ruby-forum.com/topic/4633607

Change-Id: Ifdb06d78fe3b25c704ca5d2d374d897036a245e2
Update websocket-driver 0.3.2 -> 0.3.3

This is a dependency of poltergeist.

Change-Id: Ic86ae2c829384e84abaa4e01ef3959a31b851a90