JBIDE-18544 deprecate the sites under /development/luna/central/{core,earlyaccess} as they've moved into {updates,earlyaccess}/development/luna/ >> master

Can't delete existing files because it'd break JBT Beta/CR1 users. So we deprecate/redirect until such time as we can remove all those old links entirely (ie., for JBT 4.3 / JBDS 9)