Add method for querying images with specific srpm_name
    
    This commit adds method which given set of repositories and a srpm_name
    returns image objects from those repositories which have rpms coming
    from source rpm with given name. This makes use of rpm_manifest entities
    in containerImages.
    
    By default unpublished or deprecated images are ignored. We also limit
    the results to images with latest tag to ignore older images. In the
    future we should improve this to include any floating tags not just
    latest.