SAK-26268 - Mexican Spanish translation not working properly in Sakai 10
SAK-26268 - Mexican Spanish translation not working properly in Sakai 10

Added "_es" locale copying "_es_ES".

git-svn-id: 0f50d1dafd04ba1c41542cd9dab080b4fd03842f@309905 66ffb92e-73f9-0310-93c1-f5514f145a0a

sakai-mirror/hierarchy,sakai-mirror/hierarchy