Missing aws-sdk-sqs when running tests and failing tests

[ArturMoczulski]

Running rake spec results in:

Bundler::GemRequireError:
  There was an error while trying to load the gem 'shoryuken'.
  Gem Load Error is: AWS SDK 3 requires aws-sdk-sqs to be installed separately. Please add gem 'aws-sdk-sqs' to your Gemfile

This is only solved if I add aws-sdk-sqs to the Gemfile so I assume we should add it. If there is a different procedure to run tests then we should update README.md.

Once the problem with running spec is solved, we have three failing tests:

Failed examples:

rspec ./spec/rollbar/item_spec.rb:639 # Rollbar::Item#dump with Redis instance in payload and ActiveSupport is enabled dumps to JSON correctly
rspec ./spec/rollbar/plugins/rails_js_spec.rb:11 # ApplicationController renders the snippet and config in the response
rspec ./spec/rollbar_spec.rb:1323 # Rollbar project_gems should handle regex gem patterns

[ArturMoczulski]

The PR for this has been already merged in.