Add fallback for httpd restarts on sysV platforms
    
    httpd init script on sysV based platforms cannot guarantee that two
    consecutive httpd service restarts succeed when run in a small
    time distance.
    
    Add fallback procedure that adds additional waiting time after such
    failed restart attempt, and then try to stop and start the service
    again.
    
    https://fedorahosted.org/freeipa/ticket/2965