public Response post(String path, String contentType, byte[] content) throws IOException {
    return post(cluster, path, contentType, content);
  }
Send a POST request
@param path        the path or URI
@param contentType the content MIME type
@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