Fix spec for routes to the GraphqlController
What does this MR do?
GraphQL route spec was testing the wrong endpoint
Does this MR meet the acceptance criteria?
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Tests added for this feature/bug -
Conforms to the code review guidelines -
Conforms to the merge request performance guidelines -
Conforms to the style guides (https://about.gitlab.com/handbook/engineering/quality/guidelines/test-engineering/). -
Security reports checked/validated by reviewer