Drop unnecessary obsoletes
    
    Since initscripts requires these packages anyway, the obsoletes
    aren't necessary. They're only useful if you split off a new
    subpackage and *don't* have the main package require it, but
    you still want it to be installed on updates. In this case,
    initscripts requires both initscripts-rename-device and
    initscripts-service, so there's no need for them to obsolete
    older versions of it.
    
    The initscripts-rename-device obsoletes was somehow messing up
    live image creation during the openQA update test (caused the
    live image not to include initscripts at all). This fixes that.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>