Update usage of go-tfl library

Now the caller provides the `*http.Client` (timeout set to 5 seconds)

Gopkg.toml

@@ -58,5 +58,5 @@
   version = "1.1.4"
 
 [[constraint]]
-  branch = "master"
   name = "github.com/thoeni/go-tfl"
+  version = "v1.0.0"

http_handlers_test.go

@@ -3,15 +3,16 @@ package main
 import (
 	"bytes"
 	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
 	"github.com/golang/mock/gomock"
 	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
 	"github.com/thoeni/go-tfl"
 	"github.com/thoeni/slack-tube-service/mocks"
-	"io/ioutil"
-	"net/http"
-	"net/http/httptest"
-	"testing"
 )
 
 const (
@@ -112,7 +113,7 @@ func TestLineStatusHandler_Integration_HappyPathAllLines(t *testing.T) {
 	}))
 	defer ts.Close()
 
-	cachedTflClient := tfl.NewCachedClient(120)
+	cachedTflClient := tfl.NewCachedClient(http.DefaultClient, 120)
 	cachedTflClient.SetBaseURL(ts.URL + "/")
 	tubeService = TubeService{cachedTflClient}
 
@@ -137,10 +138,10 @@ func TestLineStatusHandler_Integration_HappyPathSingleLine(t *testing.T) {
 	}))
 	defer ts.Close()
 
-	client := tfl.NewClient()
+	client := tfl.NewClient(http.DefaultClient)
 	client.SetBaseURL(ts.URL + "/")
 
-	cachedTflClient := tfl.NewCachedClient(120)
+	cachedTflClient := tfl.NewCachedClient(http.DefaultClient, 120)
 	cachedTflClient.SetBaseURL(ts.URL + "/")
 	tubeService = TubeService{cachedTflClient}
 

main.go

@@ -8,6 +8,7 @@ import (
 	"time"
 
 	"flag"
+
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/aws/session"
 	"github.com/aws/aws-sdk-go/service/dynamodb"
@@ -57,7 +58,10 @@ var (
 	)
 )
 
-var tubeService TflService = TubeService{tfl.NewCachedClient(120)}
+var httpTimeout = 5 * time.Second
+var tubeService TflService = TubeService{
+	tfl.NewCachedClient(&http.Client{Timeout: httpTimeout}, 120),
+}
 
 func initialise() {