feat(bux-246): go vet fixes

metrics/request.go

@@ -36,9 +36,9 @@ func (m *RequestMetrics) Track(method, path string) *RequestTracker {
 // RequestTracker is used to track the duration and status of a request
 type RequestTracker struct {
 	metrics   *RequestMetrics
+	startTime time.Time
 	method    string
 	path      string
-	startTime time.Time
 }
 
 // Start will start the tracking of the request