Ticket 49975: followup for broken prefix deployment
    
    Bug Description:
    	setgroups fails when not called by superuser. In case of prefix deployment
    	DS is started by regular user
    
    Fix Description:
    	Only superuser calls setgroups
    
    https://pagure.io/389-ds-base/issue/49975
    
    Reviewed by: Mark Reynolds, Ludwig Krispenz and William Brown
    
    Platforms tested: F27
    
    Flag Day: no
    
    Doc impact: no