Add scripts to compare YUM and DNF gathering
    
    There are scripts to re-run depsolving with any backend based on config
    and log file.
    
    There is a new script to compare logs from two runs and report
    differences. This script will be installed system wide in final RPM.
    
    Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>