swagger: temporarily disabled grpc-gateway DefaultErrors

Temporarily force-disabled errors definitions for generated Swagger defs
until we figure out the best approach to set them up and customize them.

Closes #81, refs #83

cmd/protoc-gen-goclay/main.go

@@ -73,6 +73,7 @@ func main() {
 	}
 	reg.SetAllowDeleteBody(*allowDeleteBody)
 	reg.SetPrefix(*importPrefix)
+	reg.SetDisableDefaultErrors(true)
 	for k, v := range pkgMap {
 		reg.AddPkgMap(k, v)
 	}