[release] Prepare XE 1.5RC2 release.
[release] Prepare XE 1.5RC2 release.

git-svn-id: c5c143bffd3ecf9af5c534b970eca9e9a9dcf339@11316 f329d543-caf0-0310-9063-dda96c69346f

pbondoer/xwiki-platform,pbondoer/xwiki-platform,xwiki/xwiki-platform,xwiki/xwiki-platform,pbondoer/xwiki-platform,xwiki/xwiki-platform,xwiki/xwiki-platform,pbondoer/xwiki-platform,xwiki/xwiki-platform,pbondoer/xwiki-platform