Fix edge case so that `metadata` language maps are ordered, even if `…

[jpmckinney]

…extension.json` didn't have language maps

[coveralls]

Pull Request Test Coverage Report for Build 71

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.03%) to 87.112%

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Totals
Change from base Build 69:	0.03%
Covered Lines:	365
Relevant Lines:	419

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💛 - Coveralls