Issue 50586 - lib389 - Fix DSEldif long line processing
    
    Description: When dse.ldif has a very long line inthe attribute value,
    it puts it to the next line and adds ' '.
    We should process it correctly in lib389.
    
    https://pagure.io/389-ds-base/issue/50586
    
    Reviewed by: mreynolds, mhonek (Thanks!)