[OWL-302] gofmt -w http/api.go
[OWL-302] gofmt -w http/api.go

Cepave/open-falcon-backend,Cepave/open-falcon-backend,Cepave/query,masato25/open-falcon-backend,masato25/open-falcon-backend,masato25/open-falcon-backend,masato25/open-falcon-backend,masato25/query,Cepave/query,Cepave/open-falcon-backend,masato25/open-falcon-backend,masato25/open-falcon-backend,masato25/query,Cepave/query,Cepave/query,masato25/query,Cepave/open-falcon-backend,masato25/query,Cepave/open-falcon-backend,Cepave/open-falcon-backend