Fix failed test #44

Support to the change in the format of I18n.backend.load_yml results in Redmine 5.0.

Author: ishikawa999

lib/message_customize/locale.rb

@@ -7,12 +7,12 @@ module Locale
 
     class << self
       def available_locales
-        @available_locales ||= I18n.load_path.map {|path| File.basename(path, '.*')}.uniq.sort.map(&:to_sym)
+        @available_locales ||= Rails.application.config.i18n.load_path.map {|path| File.basename(path, '.*')}.uniq.sort.map(&:to_sym)
       end
 
       def reload!(*languages)
         available_languages = self.find_language(languages.flatten)
-        paths = I18n.load_path.select {|path| available_languages.include?(File.basename(path, '.*').to_s)}
+        paths = Rails.application.config.i18n.load_path.select {|path| available_languages.include?(File.basename(path, '.*').to_s)}
         I18n.backend.load_translations(paths)
         if customizable_plugin_messages?
           available_languages.each{|lang| @available_messages[:"#{lang}"] = I18n.backend.send(:translations)[:"#{lang}"] || {}}
@@ -22,7 +22,7 @@ def reload!(*languages)
             if File.exist?(redmine_root_locale_path)
               loaded_yml = I18n.backend.send(:load_yml, redmine_root_locale_path)
               loaded_yml = loaded_yml.first if loaded_yml.is_a?(Array)
-              @available_messages[:"#{lang}"] = (loaded_yml[lang] || {}).deep_symbolize_keys
+              @available_messages[:"#{lang}"] = (loaded_yml[lang] || loaded_yml[lang.to_sym] || {}).deep_symbolize_keys
             end
           end
         end