@Override
    public void init(FilterConfig conf) throws ServletException {
      this.username = conf.getInitParameter(HBASE_HTTP_STATIC_USER);
      this.user = new User(username);
    }
Provides a servlet filter that pretends to authenticate a fake user (Dr.Who) so that the web UI
is usable for a secure cluster without authentication.
hbase-http/src/main/java/org/apache/hadoop/hbase/http/lib/StaticUserWebFilter.java