message: dnn(test): update opencv_face_detector checks
  original commit:
diff: @@ -606,6 +606,9 @@ TEST_P(opencv_face_detector, Accuracy)
  std::string model = findDataFile(get<0>(GetParam()), false);
  dnn::Target targetId = (dnn::Target)(int)get<1>(GetParam());
  + if (targetId == DNN_TARGET_OPENCL_FP16)
  + applyTestTag(CV_TEST_TAG_DNN_SKIP_OPENCL_FP16);
  +
  Net net = readNetFromCaffe(proto, model);
  Mat img = imread(findDataFile("gpu/lbpcascade/er.png"));
  Mat blob = blobFromImage(img, 1.0, Size(), Scalar(104.0, 177.0, 123.0), false, false);
  @@ -633,6 +636,9 @@ TEST_P(opencv_face_detector, issue_15106)
  std::string model = findDataFile(get<0>(GetParam()), false);
  dnn::Target targetId = (dnn::Target)(int)get<1>(GetParam());
  + if (targetId == DNN_TARGET_OPENCL_FP16)
  + applyTestTag(CV_TEST_TAG_DNN_SKIP_OPENCL_FP16);
  +
  Net net = readNetFromCaffe(proto, model);
  Mat img = imread(findDataFile("cv/shared/lena.png"));
  img = img.rowRange(img.rows / 4, 3 * img.rows / 4).colRange(img.cols / 4, 3 * img.cols / 4);
  @@ -646,13 +652,13 @@ TEST_P(opencv_face_detector, issue_15106)
  // An every detection is a vector of values [id, classId, confidence, left, top, right, bottom]
  Mat out = net.forward();
  Mat ref = (Mat_<float>(1, 7) << 0, 1, 0.9149431, 0.30424616, 0.26964942, 0.88733053, 0.99815309);
  - normAssertDetections(ref, out, "", 0.2, 6e-5, 1e-4);
  + normAssertDetections(ref, out, "", 0.89, 6e-5, 1e-4);
  }
  INSTANTIATE_TEST_CASE_P(Test_Caffe, opencv_face_detector,
  Combine(
  Values("dnn/opencv_face_detector.caffemodel",
  "dnn/opencv_face_detector_fp16.caffemodel"),
  - Values(DNN_TARGET_CPU, DNN_TARGET_OPENCL)
  + testing::ValuesIn(getAvailableTargets(DNN_BACKEND_OPENCV))
  )
  );
  