fix "caddy-frontend/test: Prove that disabled-cookie-list does not work"

In the end curl seems the tool which gives full control over order of the
cookies, especially with upcoming migration to python3.
9 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed Cloudooo.UnitTest-Master

00:05:50

failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

15:03:12

failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:03:08

passed SlapOS.Eggs.UnitTest-Master.Python2

00:13:11

passed SlapOS.Eggs.UnitTest-Master.Python3

00:13:29

passed SlapOS.SlapRunner.ResilienceTest-Master

00:22:42

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

01:29:08

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python2

05:29:56

passed SlapOS.SoftwareReleases.IntegrationTest-Master.Python3

05:56:26