[xwiki-infra] XWiki.org's Jira upgrade to 5.0.6

Hi guys, Jira.xwiki.org will be upgraded to version 5.0.6 at 5PM (Paris Time, GMT+1). Estimated downtime is one hour, which can vary (more or less 15 minutes). Thanks for you understanding. -- *G*uillaume Fenollar XWiki SysAdmin skype: *guillaume.fenollar*