software/caddy-frontend/test: Increase caddy wait time

5 jobs for custom_pypdf2
Status Job ID Name Coverage
  External
failed SlapOS.SlapRunner.ResilienceTest-Master

09:10:10

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

08:30:01

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python2

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python3

02:07:35

passed SlapOS.SoftwareReleases.IntegrationTest-Master.Python3