Add test for ModuleNotFoundError fix

[living180]

	Type
✓	🐛 Bug fix

This PR is a follow-up to #7940 to add a regression test for the issue fixed in that PR. It uses a simple plugin that mimics what happens in the pylint_django plugin. I verified that the test failed before the fix and passes after. I had to make my best guess as to which test module to use to add the test, so if there is a better place to put it, let me know.

Refs #7938

[coveralls]

Pull Request Test Coverage Report for Build 3703581595

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 95.476%

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Totals
Change from base Build 3699236593:	0.0%
Covered Lines:	17663
Relevant Lines:	18500

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💛 - Coveralls