Create an integration test for Etcd:

- Integration test specifically spins up an Etcd cluster with three
    nodes.

integration/etcd_test.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"net/http"
+	"os/exec"
+	"time"
+
+	"fmt"
+	checker "github.com/vdemeester/shakers"
+	check "gopkg.in/check.v1"
+)
+
+func (s *EtcdSuite) TestSimpleConfiguration(c *check.C) {
+	cmd := exec.Command(traefikBinary, "--configFile=fixtures/etcd/simple.toml")
+	err := cmd.Start()
+	c.Assert(err, checker.IsNil)
+	defer cmd.Process.Kill()
+
+	time.Sleep(1000 * time.Millisecond)
+	// TODO validate : run on 80
+	resp, err := http.Get("http://127.0.0.1:8000/")
+
+	// Expected no response as we did not configure anything
+	c.Assert(resp, checker.IsNil)
+	c.Assert(err, checker.NotNil)
+	c.Assert(err.Error(), checker.Contains, fmt.Sprintf("getsockopt: connection refused"))
+}