public Response post(String path, Header[] headers, byte[] content) throws IOException {
    return post(cluster, path, headers, content);
  }
Send a POST request
@param path    the path or URI
@param headers the HTTP headers to include, <tt>Content-Type</tt> must be supplied
@param content the content bytes
@return a Response object with response detail
hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/client/Client.java