Ticket #48153 - [adminserver] support NSS 3.18
    
    Description: The security CGI had some issues when it fails to open/
    load the NSS cert db.  This patch makes sure that if opening the db
    fails, the security CGI correctly reports an error and quits.
    
    https://fedorahosted.org/389/ticket/48153
    
    Reviewed by rmeggins@redhat.com (Thank you, Rich!!)