Add: Request ID to rack related events

[tvec]

Description

• Moved the initial logic from Add request id to headers if exists #1033 for request_id to shared utils
• New Feature: Add request_id tags (when present) to Rack event
  • Added to both Sentry::Event & Raven::Event namespaces

Why

• Inspired by https://blog.sentry.io/2019/01/31/using-nginx-sentry-trace-errors-logs & should address Automatically add request_id tag #891

Testing

• Locally using the instructions from Rails 6 Examples (top-level) & Rails 6 Examples (sentry-ruby)

[codecov-io]

Codecov Report

Merging #1111 (c46ef35) into master (44f347e) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1111      +/-   ##
==========================================
+ Coverage   98.04%   98.05%   +0.01%     
==========================================
  Files         144      147       +3     
  Lines        6101     6133      +32     
==========================================
+ Hits         5982     6014      +32     
  Misses        119      119              

Impacted Files	Coverage Δ
lib/raven/integrations/rack.rb	97.10% <100.00%> (-0.20%)	⬇️
sentry-ruby/lib/sentry/event.rb	98.98% <100.00%> (+0.03%)	⬆️
sentry-ruby/lib/sentry/interfaces/request.rb	98.00% <100.00%> (-0.15%)	⬇️
sentry-ruby/lib/sentry/utils/request_id.rb	100.00% <100.00%> (ø)
sentry-ruby/spec/sentry/event_spec.rb	100.00% <100.00%> (ø)
sentry-ruby/spec/sentry/utils/request_id_spec.rb	100.00% <100.00%> (ø)
spec/raven/event_spec.rb	97.79% <100.00%> (+0.01%)	⬆️
spec/raven/utils/request_id_spec.rb	100.00% <100.00%> (ø)
... and 1 more

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[st0012]

thanks for the work 👍

[st0012]

ah sorry, in order to make tracking/reverting the change easier (not likely though, just in case), can you split the changes into 2 PRs? one for each gem.

[tvec]

Yep, can do!

EDIT: see #1119 & #1120