Ticket 49050 - make objectclass ldapsubentry effective immediately
    
    Entries containing objectclass ldapsubentry are not returned in normal searches,
    but if the objectclass is added via ldapmodify the flag is not set in the cache entry and it is not effective until reloaded to the cache
    
    FIx: when modiifying an entry check for oc ldapsubentry and set flag in entry cache
    
    Reviewed by: Mark, William - thanks