@Override
  protected void configureInfoServer(InfoServer infoServer) {
    infoServer.addUnprivilegedServlet("rs-status", "/rs-status", RSStatusServlet.class);
    infoServer.setAttribute(REGIONSERVER, this);
  }
Starts a HRegionServer at the default location.
<p/>
Don't start any services or managers in here in the Constructor. Defer till after we register
with the Master as much as possible. See {@link #startServices}.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java