Fix naming of shared examples' files

2 shared examples files were ending in _spec
which is the pattern Rspec looks for while
loading files automatically.

Since these files were requried in multiple spec
files, the same files were bing loaded multiple
times, causing multiple definitions.

spec/lib/gitlab/cycle_analytics/code_event_fetcher_spec.rb

 # frozen_string_literal: true
 
 require 'spec_helper'
-require 'lib/gitlab/cycle_analytics/shared_event_spec'
 
 describe Gitlab::CycleAnalytics::CodeEventFetcher do
   let(:stage_name) { :code }

spec/lib/gitlab/cycle_analytics/code_stage_spec.rb

 # frozen_string_literal: true
 
 require 'spec_helper'
-require 'lib/gitlab/cycle_analytics/shared_stage_spec'
 
 describe Gitlab::CycleAnalytics::CodeStage do
   let(:stage_name) { :code }

spec/lib/gitlab/cycle_analytics/issue_event_fetcher_spec.rb

 # frozen_string_literal: true
 
 require 'spec_helper'
-require 'lib/gitlab/cycle_analytics/shared_event_spec'
 
 describe Gitlab::CycleAnalytics::IssueEventFetcher do
   let(:stage_name) { :issue }

spec/lib/gitlab/cycle_analytics/issue_stage_spec.rb

 # frozen_string_literal: true
 
 require 'spec_helper'
-require 'lib/gitlab/cycle_analytics/shared_stage_spec'
 
 describe Gitlab::CycleAnalytics::IssueStage do
   let(:stage_name) { :issue }

spec/lib/gitlab/cycle_analytics/plan_event_fetcher_spec.rb

 # frozen_string_literal: true
 
 require 'spec_helper'
-require 'lib/gitlab/cycle_analytics/shared_event_spec'
 
 describe Gitlab::CycleAnalytics::PlanEventFetcher do
   let(:stage_name) { :plan }

spec/lib/gitlab/cycle_analytics/plan_stage_spec.rb

 # frozen_string_literal: true
 
 require 'spec_helper'
-require 'lib/gitlab/cycle_analytics/shared_stage_spec'
 
 describe Gitlab::CycleAnalytics::PlanStage do
   let(:stage_name) { :plan }

spec/lib/gitlab/cycle_analytics/production_event_fetcher_spec.rb

 # frozen_string_literal: true
 
 require 'spec_helper'
-require 'lib/gitlab/cycle_analytics/shared_event_spec'
 
 describe Gitlab::CycleAnalytics::ProductionEventFetcher do
   let(:stage_name) { :production }

spec/lib/gitlab/cycle_analytics/production_stage_spec.rb

 # frozen_string_literal: true
 
 require 'spec_helper'
-require 'lib/gitlab/cycle_analytics/shared_stage_spec'
 
 describe Gitlab::CycleAnalytics::ProductionStage do
   let(:stage_name) { 'Total' }

spec/lib/gitlab/cycle_analytics/review_event_fetcher_spec.rb

 # frozen_string_literal: true
 
 require 'spec_helper'
-require 'lib/gitlab/cycle_analytics/shared_event_spec'
 
 describe Gitlab::CycleAnalytics::ReviewEventFetcher do
   let(:stage_name) { :review }

spec/lib/gitlab/cycle_analytics/review_stage_spec.rb

 # frozen_string_literal: true
 
 require 'spec_helper'
-require 'lib/gitlab/cycle_analytics/shared_stage_spec'
 
 describe Gitlab::CycleAnalytics::ReviewStage do
   let(:stage_name) { :review }

spec/lib/gitlab/cycle_analytics/staging_event_fetcher_spec.rb

 # frozen_string_literal: true
 
 require 'spec_helper'
-require 'lib/gitlab/cycle_analytics/shared_event_spec'
 
 describe Gitlab::CycleAnalytics::StagingEventFetcher do
   let(:stage_name) { :staging }

spec/lib/gitlab/cycle_analytics/staging_stage_spec.rb

 # frozen_string_literal: true
 
 require 'spec_helper'
-require 'lib/gitlab/cycle_analytics/shared_stage_spec'
 
 describe Gitlab::CycleAnalytics::StagingStage do
   let(:stage_name) { :staging }

spec/lib/gitlab/cycle_analytics/test_event_fetcher_spec.rb

 # frozen_string_literal: true
 
 require 'spec_helper'
-require 'lib/gitlab/cycle_analytics/shared_event_spec'
 
 describe Gitlab::CycleAnalytics::TestEventFetcher do
   let(:stage_name) { :test }

spec/lib/gitlab/cycle_analytics/test_stage_spec.rb

 # frozen_string_literal: true
 
 require 'spec_helper'
-require 'lib/gitlab/cycle_analytics/shared_stage_spec'
 
 describe Gitlab::CycleAnalytics::TestStage do
   let(:stage_name) { :test }

spec/lib/gitlab/cycle_analytics/shared_stage_spec.rb → spec/support/shared_examples/lib/gitlab/cycle_analytics/base_stage_shared_examples.rb

@@ -2,9 +2,9 @@
 
 require 'spec_helper'
 
-shared_examples 'base stage' do
-  ISSUES_MEDIAN = 30.minutes.to_i
+ISSUES_MEDIAN = 30.minutes.to_i
 
+shared_examples 'base stage' do
   let(:stage) { described_class.new(options: { project: double }) }
 
   before do