Add "coords" to good_keys in test_backend_configuration

[kt474]

Summary

Details and comments

Fixes #

[coveralls]

Pull Request Test Coverage Report for Build 6805332486

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• 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 55.952%

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Totals
Change from base Build 6804847368:	0.0%
Covered Lines:	2463
Relevant Lines:	4402

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