message: core(trace): add ITT control parameter
  OPENCV_TRACE_ITT_ENABLE
diff: @@ -196,15 +196,28 @@ static __itt_domain* domain = NULL;
  static bool isITTEnabled()
  {
  - static bool isInitialized = false;
  + static volatile bool isInitialized = false;
  static bool isEnabled = false;
  if (!isInitialized)
  + {
  + cv::AutoLock lock(cv::getInitializationMutex());
  + if (!isInitialized)
  + {
  + bool param_traceITTEnable = utils::getConfigurationParameterBool("OPENCV_TRACE_ITT_ENABLE", true);
  + if (param_traceITTEnable)
  {
  isEnabled = !!(__itt_api_version());
  CV_LOG_ITT("ITT is " << (isEnabled ? "enabled" : "disabled"));
  domain = __itt_domain_create("OpenCVTrace");
  + }
  + else
  + {
  + CV_LOG_ITT("ITT is disabled through OpenCV parameter");
  + isEnabled = false;
  + }
  isInitialized = true;
  }
  + }
  return isEnabled;
  }
  #endif
  