As a user of clowder, I would like to be able to disable certain jobs, so that they never run on the system.

This is useful in environments where the presence of certain image on a cluster presents a security issue.

Design:

The solution is to implement a new flag in the JobSpec inside the ClowdApp specification that will by pass the creation of any CronJob resource, as well as bypass the creation of Job resource during a CJI invocation.

Acceptance Criteria:

• Implement a new boolean flag inside the JobSpec called 

  ClowdApp.Spec.Jobs[].Disabled

• Ensure the CJI correctly reports the error state that a Job has been disabled
• Implement a test to ensure the job does not arrive on the system