i18n: Update zanata configurations
    
    Updates made:
    
      - Change https://zanata.phx.ovirt.org to https://zanata.ovirt.org
    
      - Use a newer version of the zanata maven plugin to manage pull and
        push transactions.  The older version references a version of JAXB
        that no longer works on the current 1.8 JDK.
    
      - Drop the use of Java 1.8 to run the zanata maven plugin, Java 11
        works with the updated plugin.