fix: support retryable http clients

Closes coop-cloud/organising#257.

pkg/catalogue/catalogue.go

@@ -7,7 +7,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
-	"net/http"
 	"os"
 	"path"
 	"strings"
@@ -122,7 +121,7 @@ func (r ByRecipeName) Less(i, j int) bool {
 // recipeCatalogueFSIsLatest checks whether the recipe catalogue stored locally
 // is up to date.
 func recipeCatalogueFSIsLatest() (bool, error) {
-	httpClient := &http.Client{Timeout: web.Timeout}
+	httpClient := web.NewHTTPRetryClient()
 	res, err := httpClient.Head(RecipeCatalogueURL)
 	if err != nil {
 		return false, err