message: Update MKL+Horovod test case
diff: # limitations under the License.
  # ============================================================================
  -{ # try
  - echo `python -c 'from tensorflow.python import _pywrap_util_port; print(_pywrap_util_port.IsMklEnabled()); import horovod.tensorflow as hvd'`
  +python -c 'from tensorflow.python import _pywrap_util_port; print(_pywrap_util_port.IsMklEnabled()); import horovod.tensorflow as hvd'
  +new_mkl_horovod_enabled=$?
  +
  +python -c 'from tensorflow.python import pywrap_tensorflow; print(pywrap_tensorflow.IsMklEnabled()); import horovod.tensorflow as hvd'
  +old_mkl_horovod_enabled=$?
  +
  +if [[ $new_mkl_horovod_enabled -eq 0 ]]; then
  echo "PASS: Horovod with MKL is enabled"
  -} || { # catch
  - echo `python -c 'from tensorflow.python import pywrap_tensorflow; print(pywrap_tensorflow.IsMklEnabled()); import horovod.tensorflow as hvd'`
  +elif [[ $old_mkl_horovod_enabled -eq 0]]; then
  echo "PASS: Horovod with Old MKL is detected"
  -} || { # finally
  +else
  die "FAIL: Horovod with MKL is not enabled"
  -}
  +fi
  