Use AppLogger in lib/gitlab/*

This MR adds AppLogger in some files
in lib/gitlab/* and also adds
changelog for the same

Add changelog for the change

Fix spec failures

changelogs/unreleased/app-logger-18.yml

+---
+title: Use GitLab AppLogger
+merge_request: 41290
+author: Rajendra Kadam
+type: other

ee/lib/ee/gitlab/auth/ldap/sync/groups.rb

@@ -34,11 +34,11 @@ module EE
               if config.admin_group.present?
                 sync_admin_users
               else
-                logger.debug { "No `admin_group` configured for '#{provider}' provider. Skipping" }
+                logger.debug "No `admin_group` configured for '#{provider}' provider. Skipping"
               end
 
               if config.external_groups.empty?
-                logger.debug { "No `external_groups` configured for '#{provider}' provider. Skipping" }
+                logger.debug "No `external_groups` configured for '#{provider}' provider. Skipping"
               else
                 sync_external_users
               end
@@ -49,32 +49,32 @@ module EE
             private
 
             def sync_groups
-              logger.debug { "Performing LDAP group sync for '#{provider}' provider" }
+              logger.debug "Performing LDAP group sync for '#{provider}' provider"
 
               groups_where_group_links_with_provider_ordered.each do |group|
                 Sync::Group.execute(group, proxy)
               end
 
-              logger.debug { "Finished LDAP group sync for '#{provider}' provider" }
+              logger.debug "Finished LDAP group sync for '#{provider}' provider"
             end
 
             def sync_admin_users
-              logger.debug { "Syncing admin users for '#{provider}' provider" }
+              logger.debug "Syncing admin users for '#{provider}' provider"
 
               if Sync::AdminUsers.execute(proxy)
-                logger.debug { "Finished syncing admin users for '#{provider}' provider" }
+                logger.debug "Finished syncing admin users for '#{provider}' provider"
               else
-                logger.debug { "Error syncing admin users for '#{provider}' provider. LDAP connection error" }
+                logger.debug "Error syncing admin users for '#{provider}' provider. LDAP connection error"
               end
             end
 
             def sync_external_users
-              logger.debug { "Syncing external users for '#{provider}' provider" }
+              logger.debug "Syncing external users for '#{provider}' provider"
 
               if Sync::ExternalUsers.execute(proxy)
-                logger.debug { "Finished syncing external users for '#{provider}' provider" }
+                logger.debug "Finished syncing external users for '#{provider}' provider"
               else
-                logger.debug { "Error syncing external users for '#{provider}' provider. LDAP connection error" }
+                logger.debug "Error syncing external users for '#{provider}' provider. LDAP connection error"
               end
             end
 
@@ -92,7 +92,7 @@ module EE
             end
 
             def logger
-              Rails.logger # rubocop:disable Gitlab/RailsLogger
+              ::Gitlab::AppLogger
             end
           end
         end

lib/gitlab/auth/ldap/person.rb

@@ -45,7 +45,7 @@ module Gitlab
         def self.normalize_dn(dn)
           ::Gitlab::Auth::Ldap::DN.new(dn).to_normalized_s
         rescue ::Gitlab::Auth::Ldap::DN::FormatError => e
-          Gitlab::AppLogger.info("Returning original DN \"#{dn}\" due to error during normalization attempt: #{e.message}") # rubocop:disable Gitlab/RailsLogger
+          Gitlab::AppLogger.info("Returning original DN \"#{dn}\" due to error during normalization attempt: #{e.message}")
 
           dn
         end

lib/gitlab/reference_counter.rb

@@ -51,10 +51,8 @@ module Gitlab
       redis_cmd do |redis|
         current_value = redis.decr(key)
         if current_value < 0
-          # rubocop:disable Gitlab/RailsLogger
-          Rails.logger.warn("Reference counter for #{gl_repository} decreased" \
+          Gitlab::AppLogger.warn("Reference counter for #{gl_repository} decreased" \
             " when its value was less than 1. Resetting the counter.")
-          # rubocop:enable Gitlab/RailsLogger
           redis.del(key)
         end
       end
@@ -87,7 +85,7 @@ module Gitlab
 
       true
     rescue => e
-      Rails.logger.warn("GitLab: An unexpected error occurred in writing to Redis: #{e}") # rubocop:disable Gitlab/RailsLogger
+      Gitlab::AppLogger.warn("GitLab: An unexpected error occurred in writing to Redis: #{e}")
 
       false
     end

spec/lib/gitlab/reference_counter_spec.rb

@@ -21,7 +21,7 @@ RSpec.describe Gitlab::ReferenceCounter, :clean_gitlab_redis_shared_state do
     end
 
     it 'warns if attempting to decrease a counter with a value of zero or less, and resets the counter' do
-      expect(Rails.logger).to receive(:warn).with("Reference counter for project-1" \
+      expect(Gitlab::AppLogger).to receive(:warn).with("Reference counter for project-1" \
         " decreased when its value was less than 1. Resetting the counter.")
       expect { reference_counter.decrease }.not_to change { reference_counter.value }
     end