Fix structured data in header

The client is looking for an attribute named `require-token`; the
server was replying with `use-token-on-read`.  Now both are using
`require-token`.

director.go

@@ -63,7 +63,7 @@ func CreateNsFromDirectorResp(dirResp *http.Response, namespace *namespaces.Name
 	}
 	xPelicanNamespace := HeaderParser(pelicanNamespaceHdr[0])
 	namespace.Path = xPelicanNamespace["namespace"]
-	namespace.UseTokenOnRead, _ = strconv.ParseBool(xPelicanNamespace["use-token-on-read"])
+	namespace.UseTokenOnRead, _ = strconv.ParseBool(xPelicanNamespace["require-token"])
 	namespace.ReadHTTPS, _ = strconv.ParseBool(xPelicanNamespace["readhttps"])
 
 	var xPelicanAuthorization map[string]string

director_test.go

@@ -74,7 +74,7 @@ func TestCreateNsFromDirectorResp(t *testing.T) {
 	//Craft the Director's response
 	directorHeaders := make(map[string][]string)
 	directorHeaders["Link"] = []string{"<my-cache.edu:8443>; rel=\"duplicate\"; pri=1, <another-cache.edu:8443>; rel=\"duplicate\"; pri=2"}
-	directorHeaders["X-Pelican-Namespace"] = []string{"namespace=/foo/bar, readhttps=True, use-token-on-read=True"}
+	directorHeaders["X-Pelican-Namespace"] = []string{"namespace=/foo/bar, readhttps=True, require-token=True"}
 	directorHeaders["X-Pelican-Authorization"] = []string{"issuer=https://get-your-tokens.org, base-path=/foo/bar"}
 	directorBody := []byte(`{"key": "value"}`)