Set internal backup directory modes on create

This sidesteps problems with running 'chmod' on some CIFS mounts.

lib/backup/database.rb

@@ -7,7 +7,7 @@ module Backup
     def initialize
       @config = YAML.load_file(File.join(Rails.root,'config','database.yml'))[Rails.env]
       @db_dir = File.join(Gitlab.config.backup.path, 'db')
-      FileUtils.mkdir_p(@db_dir) unless Dir.exists?(@db_dir)
+      FileUtils.mkdir_p(@db_dir, mode: 0700)unless Dir.exists?(@db_dir)
     end
 
     def dump

lib/backup/manager.rb

@@ -16,8 +16,6 @@ module Backup
           file << s.to_yaml.gsub(/^---\n/,'')
         end
 
-        FileUtils.chmod(0700, folders_to_backup)
-
         # create archive
         $progress.print "Creating backup archive: #{tar_file} ... "
         orig_umask = File.umask(0077)

lib/backup/repository.rb

@@ -130,7 +130,7 @@ module Backup
 
     def prepare
       FileUtils.rm_rf(backup_repos_path)
-      FileUtils.mkdir_p(backup_repos_path)
+      FileUtils.mkdir_p(backup_repos_path, mode: 0700)
     end
 
     def silent

lib/backup/uploads.rb

@@ -10,7 +10,7 @@ module Backup
 
     # Copy uploads from public/uploads to backup/uploads
     def dump
-      FileUtils.mkdir_p(backup_uploads_dir)
+      FileUtils.mkdir_p(backup_uploads_dir, mode: 0700)
       FileUtils.cp_r(app_uploads_dir, backup_dir)
     end