When image creation fails, the test coninues without reporting error right after it

[YanZhangADS]

When using Makefile to do test all notebooks together, if the image creation failed in notebook 04_CreateImage.ipynb, the run does not stop at the cell where the failure happens. It continues to run through the remaining cells in notebook 04_CreateImage.ipynb. Then it continues to run the next notebook (05_DeployOnAKS.ipynb) and stop in this notebook reporting cannot create web service from failed image.

Ideally the run should stop at the cell when the image creation fails.