Add cobertura SimpleCov coverage reporter to all rspec tests

Gemfile

@@ -371,6 +371,7 @@ group :development, :test do
   gem 'scss_lint', '~> 0.56.0', require: false
   gem 'haml_lint', '~> 0.34.0', require: false
   gem 'simplecov', '~> 0.18.5', require: false
+  gem 'simplecov-cobertura', '~> 1.3.1', require: false
   gem 'bundler-audit', '~> 0.6.1', require: false
 
   gem 'benchmark-ips', '~> 2.3.0', require: false

Gemfile.lock

@@ -1021,6 +1021,8 @@ GEM
     simplecov (0.18.5)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
+    simplecov-cobertura (1.3.1)
+      simplecov (~> 0.8)
     simplecov-html (0.12.2)
     sixarm_ruby_unaccent (1.2.0)
     slack-messenger (2.3.3)
@@ -1382,6 +1384,7 @@ DEPENDENCIES
   sidekiq-cron (~> 1.0)
   simple_po_parser (~> 1.1.2)
   simplecov (~> 0.18.5)
+  simplecov-cobertura (~> 1.3.1)
   slack-messenger (~> 2.3.3)
   snowplow-tracker (~> 0.6.1)
   spring (~> 2.0.0)

scripts/merge-simplecov

@@ -2,6 +2,7 @@
 
 require_relative '../spec/simplecov_env'
 SimpleCovEnv.configure_profile
+SimpleCovEnv.configure_formatter
 
 module SimpleCov
   module ResultMerger

spec/simplecov_env.rb

 # frozen_string_literal: true
 
 require 'simplecov'
+require 'simplecov-cobertura'
 require 'active_support/core_ext/numeric/time'
 require_relative '../lib/gitlab/utils'
 
@@ -12,10 +13,19 @@ module SimpleCovEnv
 
     configure_profile
     configure_job
+    configure_formatter
 
     SimpleCov.start
   end
 
+  def configure_formatter
+    SimpleCov.formatters = SimpleCov::Formatter::MultiFormatter.new([
+      SimpleCov::Formatter::SimpleFormatter,
+      SimpleCov::Formatter::HTMLFormatter,
+      SimpleCov::Formatter::CoberturaFormatter
+    ])
+  end
+
   def configure_job
     SimpleCov.configure do
       if ENV['CI_JOB_NAME']