Jobs removed in the jenkins-jobs repository are not (always?) deleted from Jenkins

Originally created by @intrigeri on #8913 (Redmine)

I’ve just deleted a Jenkins job via the jenkins-jobs repo, and then it was still active in Jenkins. I had to manually jenkins-jobs delete build_Tails_ISO_feature-linux-3.18 to remove it for real. Of course this cannot possibly scale once we add/remove dozens of jobs each month.

A similar problem we were suffering from was fixed in Jessie with jenkins-job-builder (0.9.0-0.2), which we are running, but it doesn’t fix this issue.

Parent Task: tails/tails#7423

Related issues

• Blocks tails/sysadmin#6196