Fix DB seeds to not require RSpec

Split `spec/support/sidekiq.rb` into two separate files. One for
adding the middleware and the other for Rspec configuration.

db/fixtures/development/01_admin.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 Gitlab::Seeder.quiet do
   User.create!(

db/fixtures/development/03_project.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 class Gitlab::Seeder::Projects
   include ActionView::Helpers::NumberHelper

db/fixtures/development/06_teams.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 Sidekiq::Testing.inline! do
   Gitlab::Seeder.quiet do

db/fixtures/development/07_milestones.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 Gitlab::Seeder.quiet do
   Project.not_mass_generated.each do |project|

db/fixtures/development/09_issues.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 Gitlab::Seeder.quiet do
   Rake::Task["gitlab:seed:issues"].invoke

db/fixtures/development/10_merge_requests.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 Gitlab::Seeder.quiet do
   # Limit the number of merge requests per project to avoid long seeds

db/fixtures/development/11_keys.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 
 # Creating keys runs a gitlab-shell worker. Since we may not have the right

db/fixtures/development/12_snippets.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 Gitlab::Seeder.quiet do
   content =<<eos

db/fixtures/development/13_comments.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 Gitlab::Seeder.quiet do
   Issue.find_each do |issue|

db/fixtures/development/14_pipelines.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 class Gitlab::Seeder::Pipelines
   STAGES = %w[build test deploy notify]

db/fixtures/development/15_award_emoji.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 Gitlab::Seeder.quiet do
   EMOJI = Gitlab::Emoji.emojis.keys

db/fixtures/development/16_protected_branches.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 Gitlab::Seeder.quiet do
   admin_user = User.find(1)

db/fixtures/development/17_cycle_analytics.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 require './spec/support/helpers/test_env'
 
 class Gitlab::Seeder::CycleAnalytics

db/fixtures/development/19_environments.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 class Gitlab::Seeder::Environments
   def initialize(project)

db/fixtures/development/20_nested_groups.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 Sidekiq::Testing.inline! do
   Gitlab::Seeder.quiet do

db/fixtures/development/24_forks.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 Sidekiq::Testing.inline! do
   Gitlab::Seeder.quiet do

db/fixtures/development/25_api_personal_access_token.rb

 # frozen_string_literal: true
 
-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 # Create an api access token for root user with the value: ypCa3Dzb23o5nvsixwPA
 Gitlab::Seeder.quiet do

ee/db/fixtures/development/20_burndown.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 require './spec/support/helpers/test_env'
 
 class Gitlab::Seeder::Burndown

ee/db/fixtures/development/20_vulnerabilities.rb

-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 class Gitlab::Seeder::Vulnerabilities
   attr_reader :project

ee/db/fixtures/development/90_productivity_analytics.rb

 # frozen_string_literal: true
 
-require './spec/support/sidekiq'
+require './spec/support/sidekiq_middleware'
 
 class Gitlab::Seeder::ProductivityAnalytics
   def initialize(project)

spec/support/sidekiq.rb

 # frozen_string_literal: true
 
-require 'sidekiq/testing'
-
-# If Sidekiq::Testing.inline! is used, SQL transactions done inside
-# Sidekiq worker are included in the SQL query limit (in a real
-# deployment sidekiq worker is executed separately). To avoid
-# increasing SQL limit counter, the request is marked as whitelisted
-# during Sidekiq block
-class DisableQueryLimit
-  def call(worker_instance, msg, queue)
-    transaction = Gitlab::QueryLimiting::Transaction.current
-
-    if !transaction.respond_to?(:whitelisted) || transaction.whitelisted
-      yield
-    else
-      transaction.whitelisted = true
-      yield
-      transaction.whitelisted = false
-    end
-  end
-end
-
-Sidekiq::Testing.server_middleware do |chain|
-  chain.add Gitlab::SidekiqStatus::ServerMiddleware
-  chain.add DisableQueryLimit
-end
-
 RSpec.configure do |config|
   config.around(:each, :sidekiq) do |example|
     Sidekiq::Worker.clear_all

spec/support/sidekiq_middleware.rb

+# frozen_string_literal: true
+
+require 'sidekiq/testing'
+
+# If Sidekiq::Testing.inline! is used, SQL transactions done inside
+# Sidekiq worker are included in the SQL query limit (in a real
+# deployment sidekiq worker is executed separately). To avoid
+# increasing SQL limit counter, the request is marked as whitelisted
+# during Sidekiq block
+class DisableQueryLimit
+  def call(worker_instance, msg, queue)
+    transaction = Gitlab::QueryLimiting::Transaction.current
+
+    if !transaction.respond_to?(:whitelisted) || transaction.whitelisted
+      yield
+    else
+      transaction.whitelisted = true
+      yield
+      transaction.whitelisted = false
+    end
+  end
+end
+
+Sidekiq::Testing.server_middleware do |chain|
+  chain.add Gitlab::SidekiqStatus::ServerMiddleware
+  chain.add DisableQueryLimit
+end