Pontoon: Update Japanese (ja) localization of Test Pilot Website
Pontoon: Update Japanese (ja) localization of Test Pilot Website

Localization authors:
- Kohei Yoshino <kohei.yoshino@gmail.com>

6a68/testpilot,mozilla/idea-town-server,mathjazz/testpilot,lmorchard/idea-town-server,meandavejustice/testpilot,flodolo/testpilot,dannycoates/testpilot,meandavejustice/testpilot,6a68/idea-town,lmorchard/testpilot,lmorchard/idea-town-server,fzzzy/testpilot,clouserw/testpilot,flodolo/testpilot,fzzzy/testpilot,chuckharmston/testpilot,6a68/idea-town,clouserw/testpilot,lmorchard/testpilot,mathjazz/testpilot,fzzzy/testpilot,mathjazz/testpilot,lmorchard/idea-town,clouserw/testpilot,mozilla/idea-town,6a68/testpilot,dannycoates/testpilot,mozilla/idea-town,lmorchard/idea-town,lmorchard/idea-town,chuckharmston/testpilot,6a68/testpilot,6a68/testpilot,mozilla/idea-town-server,lmorchard/idea-town-server,mozilla/idea-town,lmorchard/testpilot,dannycoates/testpilot,meandavejustice/testpilot,fzzzy/testpilot,clouserw/testpilot,mozilla/idea-town,meandavejustice/testpilot,flodolo/testpilot,lmorchard/idea-town-server,6a68/idea-town,chuckharmston/testpilot,chuckharmston/testpilot,mathjazz/testpilot,lmorchard/testpilot,6a68/idea-town,dannycoates/testpilot,lmorchard/idea-town,flodolo/testpilot,mozilla/idea-town-server,mozilla/idea-town-server