Terminology improvements: CA renewal
    
    The term "CA renewal master" is a fixed term in FreeIPA and cannot
    easily be replaced with an alternative term. At least we should use the
    term consistently.
    
    See: https://tools.ietf.org/id/draft-knodel-terminology-01.html
    Signed-off-by: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Alexander Bokovoy <abbra@users.noreply.github.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>