Ticket #48190 - idm/ipa 389-ds-base entry cache converges to 500 KB in dblayer_is_cachesize_sane
    
    Description: This issue was introduced by the fix for Ticket 47499
    commit 1e035d1111f6abcb87e760a2b9e41fa9e05a7ebd.
    
    The function dblayer_is_cachesize_sane was originally implemented for
    db cache to check if the given db cache size is larger than the available
    memory or not.  The function resets the size to the available memory size
    if it is larger.  Also, considering the extra metadata size needed for the
    db cache, it multiplies by 0.8 every time it starts the server.  It is not
    needed even for the db cache.  The code is old and we don't have to save
    the memory there.  Thus, this patch removes the resetting code.
    
    https://fedorahosted.org/389/ticket/48190
    
    Reviewed by mreynolds@redhat.com (Thank you, Mark!!)
    
    (cherry picked from commit bf9ef718cfd48c26eaf11662f522451d866e7681)