Ticket 47495 - admin express: wrong instance creation time
Bug Description: Admin express attempted to convert a gmtime value
as if it was in the format: YYYYmmddHHMMSS
This gave the wrong value in Admin Express.
Fix Description: Propeperly convert gmtime - reused the same functions
389-ds-base uses to convert a gmtime to a nice string.
https://fedorahosted.org/389/ticket/47495
Reviewed by: nhosoi(Thanks!)