Build container image without an RPM
    
    Prior to this commit, the process of building a container image for
    Freshmaker created a temporary RPM which was then installed in the
    container image.
    
    Given that the RPM is immediately discarded, and that Freshmaker is
    never distributed as an RPM, this process is unnecessarily complex.
    
    This commit removes the RPM build process completely and simply builds
    the container image directly from source.
    
    Because Freshmaker is not installed from an RPM, its contents are found
    in a different location. Previously, the freshmaker-* console scripts
    were installed under /usr/bin, but now they're under /usr/local/bin.
    This is also true for the python package. It has moved from
    /usr/lib/python3.7/site-packages/freshmaker to
    /usr/local/lib/python3.7/site-packages/freshmaker
    
    This change in path is expected as /usr/local is meant for content not
    provided by the Linux distribution itself.
    
    Also, man pages for the freshmaker-* console scripts are no longer
    generated. There appears to be no value in generating those.
    
    Signed-off-by: Luiz Carvalho <lucarval@redhat.com>
    
    wip: will this work?!
    
    Signed-off-by: Luiz Carvalho <lucarval@redhat.com>