playbook/roles/ridge: Add success flag.

Printing the string "Build successful, connect to:" in the logs is the
success flag when running Test Suites.
14 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.StandaloneDeploymentScriptTest-Debian.Bullseye

15:02:10

failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster

15:02:00

failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster.JEROME

13:25:26

failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:01:54

failed ERP5.StandaloneDeploymentScriptTest-Debian.Stretch

15:02:05

failed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Bullseye

15:02:11

failed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Buster

15:01:49

failed SlapOS-Master.StandaloneDeploymentScriptTest-Debian.Stretch

15:01:55

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Bullseye

15:02:13

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster

15:02:06

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:02:23

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Stretch

15:01:51

failed ERP5.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:02:02

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:02:10