Replace godep with dep

vendor/github.com/zakjan/cert-chain-resolver/tests/http-server.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+)
+
+func main() {
+	fs := http.FileServer(http.Dir(os.Args[1]))
+	http.Handle("/", fs)
+
+	err := http.ListenAndServe(":http", nil)
+
+	if err != nil {
+		fmt.Println(err)
+	}
+}