584a5dd Trim old changelogs since they have little useful info

Authored and Committed by berrange 6 years ago
    Trim old changelogs since they have little useful info
    
    The changelogs don't contain any info about the function changes,
    for that there is the libvirt release notes. For changes about
    the specfile, it is more effective to use GIT history directly.
    
        
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