Add opening brace to enum graphql representation

[joycex99]

Previously, the graphql representation of enums was missing the opening brace {.

[coveralls]

Pull Request Test Coverage Report for Build 1343486603

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 1241951156:	0.0%
Covered Lines:	1496
Relevant Lines:	1496

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💛 - Coveralls

[barbieri]

thanks @joycex99