Add unmaintained/out-of-date warning to Japanese glossary
Add unmaintained/out-of-date warning to Japanese glossary

The current Zanata glossary only supports translation words
and cannot contains contextual information which is important
for translations. As far as I heard, the latest Zanata supports
contextual information and useful glossary editors. Once OpenStack
Zanata instance is upgraded, then Japanese team considers using
Zanata glossary. Until then, we decided to maintain Japanese
glossary on OpenStack wiki.

Japanese glossary on Zanata has been deleted.
There is no meaning to have it only on the repo,
but other i18n team members prefer to keeping it,
so this commit adds warnings.

Change-Id: I84ab0af9545407e7ce02028caac4738acbe24cd5

openstack/i18n,openstack/i18n