Merge branch 'attachment-delete-service' into 'master'

Attachment delete service

See merge request !349

lib/tasks/attachment_maintaining_service.rake

+require 'fileutils'
+
+  namespace :attachment_maintaining_service do
+    desc 'Removing 10 attachments'
+    task remove_attachments: :environment do
+      m = sort_directories.first(10)
+      m.each do |mm|
+        #puts (mm)
+        FileUtils.rm_r(mm)
+      end
+    end
+
+    def sort_directories
+      files_sorted_by_time = Dir[dir_path].sort_by{ |f| File.atime(f) }
+      files_sorted_by_time
+    end
+
+    private
+
+    def dir_path
+      c = Rails.root.join('public','attachments','*').to_s
+      c
+    end
+
+  end