Restore exposure of legend property for events

app/serializers/analytics_stage_entity.rb

@@ -2,6 +2,7 @@ class AnalyticsStageEntity < Grape::Entity
   include EntityDateHelper
 
   expose :title
+  expose :legend
   expose :description
 
   expose :median, as: :value do |stage|

lib/gitlab/cycle_analytics/code_stage.rb

@@ -13,6 +13,10 @@ module Gitlab
         :code
       end
 
+      def legend
+        "Related Merge Requests"
+      end
+
       def description
         "Time until first merge request"
       end

lib/gitlab/cycle_analytics/issue_stage.rb

@@ -14,6 +14,10 @@ module Gitlab
         :issue
       end
 
+      def legend
+        "Related Issues"
+      end
+
       def description
         "Time before an issue gets scheduled"
       end

lib/gitlab/cycle_analytics/plan_stage.rb

@@ -14,6 +14,10 @@ module Gitlab
         :plan
       end
 
+      def legend
+        "Related Commits"
+      end
+
       def description
         "Time before an issue starts implementation"
       end

lib/gitlab/cycle_analytics/production_stage.rb

@@ -15,6 +15,10 @@ module Gitlab
         :production
       end
 
+      def legend
+        "Related Issues"
+      end
+
       def description
         "From issue creation until deploy to production"
       end

lib/gitlab/cycle_analytics/review_stage.rb

@@ -13,6 +13,10 @@ module Gitlab
         :review
       end
 
+      def legend
+        "Relative Merged Requests"
+      end
+
       def description
         "Time between merge request creation and merge/close"
       end

lib/gitlab/cycle_analytics/staging_stage.rb

@@ -14,6 +14,10 @@ module Gitlab
         :staging
       end
 
+      def legend
+        "Relative Deployed Builds"
+      end
+
       def description
         "From merge request merge until deploy to production"
       end

lib/gitlab/cycle_analytics/test_stage.rb

@@ -13,6 +13,10 @@ module Gitlab
         :test
       end
 
+      def legend
+        "Relative Builds Trigger by Commits"
+      end
+
       def description
         "Total test time for all commits/merges"
       end