ja.po: ch_ops_maintenance.xml
unify notation.
reflect review comments (partial, for test purpose).
reflect review comments (partial, for test purpose).
reflect review comments (partial, for test purpose).
reflect review comment.
reflect review comment.
reflect review comments.
reflect review comments.
reflect left-off review comments.
Minor clean up of ch_ops_maintenance
Merge pull request #29 from openstack-ja/trans-ja/ch_ops_maintenance.xml

ja.po: ch_ops_maintenance.xml