fixed Japanese localization overall according to...

fixed Japanese localization overall according to http://www.simonwiest.de/glottr/report/ja.html (3/25). 
More efforts are needed.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@29367 71c3de6d-444a-0410-be80-ed276b4c234a