Fix test flags initialization order

Author: Yury Rashetska

responses_test.go

@@ -1,22 +1,19 @@
 package twilio
 
 import (
-	"flag"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
 	"os"
 	"sync"
-	"testing"
 )
 
 // the envClient is configured to use an Account Sid and Auth Token set in the
 // environment. all non-short tests should use the envClient
 var envClient *Client
 
 func init() {
-	flag.Parse()
-	if !testing.Short() && os.Getenv("TWILIO_ACCOUNT_SID") == "" {
+	if os.Getenv("TWILIO_ACCOUNT_SID") == "" {
 		os.Stderr.WriteString("warning: no TWILIO_ACCOUNT_SID configured, HTTP tests will probably fail...\n\n")
 	}
 	envClient = NewClient(os.Getenv("TWILIO_ACCOUNT_SID"), os.Getenv("TWILIO_AUTH_TOKEN"), nil)