'lint' can run with different 'rpmlint' versions
    
    'lint' subcommand internally executes 'rpmlint' binary. With
    'rpmlint' package version 2.x it changed some of its input arguments.
    Rpkg has to recognize the installed 'rpmlint' version and use
    the corresponding switch/argument. Specifically, '-f' switch for user
    config file has changed to '-r' in the newer version.
    Additionally, fixes some paths to source RPMs.
    
    JIRA: RHELCMP-7842
    Resolves: rhbz#1967821
    
    Signed-off-by: Ondrej Nosek <onosek@redhat.com>