Bug: Fix file path issue in mobilenet2 demo.

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Describe the bug

The mobilenet2 demo points to a folder called test_images. Remove the dependency by using the image link that's in the mobilenet1 demo.

Steps to reproduce the issue

1. Try to run the mobilenet2 demo.
2. It breaks and shows you the following output:

3. Fix it to use the same image link as provided for mobilenet1.

Expected behavior

It's supposed to retrieve the image and perform an evaluation on it to determine what the image is of.

Please complete the following environment information

No response

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Fix is here - #316