Start first enumeration immediately
    
    Previously, we would wait for ten seconds before starting an
    enumeration. However, this meant that on the first startup (before
    we had run our first enumeration) there was a ten-second window
    where clients would immediately get back a response with no
    entries instead of blocking until the enumeration completed.
    
    With this patch, SSSD will now run an enumeration immediately upon
    startup. Further startups will retain the ten-second delay so as
    not to slow down system bootups.
    
    https://fedorahosted.org/sssd/ticket/616