SAP-cloud-infrastructure / hermez / 16091286485

Pull #317

github

pkg/api: refctor to use httpapi composition pattern

- replace manual mux.Router with httpapi.Compose()
- add V1API, VersionAPI, Metrics Api with AddTo() methods
- Standardize as much as possible with go-bits respondwith patterns
- Rename ReturnJSON to ReturnESJSON to indicate it's specific ES requirements
- move utilities to fovused files (response.go, middleware.go)

164 of 240 new or added lines in 6 files covered. (68.33%)

564 of 1023 relevant lines covered (55.13%)

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