Rename skip_metrics to imported on the importable concern

app/models/concerns/importable.rb

@@ -4,6 +4,6 @@ module Importable
   attr_accessor :importing
   alias_method :importing?, :importing
 
-  attr_accessor :skip_metrics
-  alias_method :skip_metrics?, :skip_metrics
+  attr_accessor :imported
+  alias_method :imported?, :imported
 end

app/models/concerns/issuable.rb

@@ -100,7 +100,7 @@ module Issuable
     acts_as_paranoid
 
     after_save :update_assignee_cache_counts, if: :assignee_id_changed?
-    after_save :record_metrics, unless: :skip_metrics?
+    after_save :record_metrics, unless: :imported?
 
     def update_assignee_cache_counts
       # make sure we flush the cache for both the old *and* new assignees(if they exist)

lib/gitlab/github_import/pull_request_formatter.rb

@@ -21,7 +21,7 @@ module Gitlab
           assignee_id: assignee_id,
           created_at: raw_data.created_at,
           updated_at: raw_data.updated_at,
-          skip_metrics: true
+          imported: true
         }
       end