build: OpenAPI spec formatting (#54)

Adds formatting for the OpenAPI JSON and YAML files in order to make
them easier to read and diff.

PLAT-86

Author: jason-lynch

api/Makefile

@@ -3,6 +3,7 @@ include ../tools.mk
 .PHONY: generate-v1
 generate-v1:
 	goa gen github.com/pgEdge/control-plane/api/v1/design -o v1
+	$(yamlfmt) $(CURDIR)/v1/gen/http/*.yaml
 
 .PHONY: generate
 generate: generate-v1

api/v1/design/api.go

@@ -19,6 +19,7 @@ var _ = g.API("control-plane", func() {
 		})
 	})
 	g.Meta("openapi:operationId", "{method}")
+	g.Meta("openapi:json:indent", "  ")
 
 	// Common errors
 	g.Error("cluster_already_initialized", APIError)