[maven-release-plugin] prepare branch xwiki-enterprise-1.6
[maven-release-plugin] prepare branch xwiki-enterprise-1.6

git-svn-id: cf27bad30c6b7316185bdac65b014e8c16cd40b6@13176 f329d543-caf0-0310-9063-dda96c69346f

xwiki/xwiki-enterprise,xwiki/xwiki-enterprise