SAK-26023 - Update es_ES translations up to 100% (Crowdin - 2014) Merge into 10.x

git-svn-id: https://source.sakaiproject.org/svn/content/branches/sakai-10.x@309903 66ffb92e-73f9-0310-93c1-f5514f145a0a
SAK-26268 - Mexican Spanish translation not working properly in Sakai 10 (Merge into 10.x)

Added "_es" locale copying "_es_ES".

git-svn-id: https://source.sakaiproject.org/svn/content/branches/sakai-10.x@309906 66ffb92e-73f9-0310-93c1-f5514f145a0a