XD-1311 XD-1767 JobExecution deployed/deleted status

- Add `deployed` and `deleted` status to JobExecutionInfoResource
- At BatchJobExecutionsController:
  - If the job name exists in the `JobDefinitionRepository` but not at the
`JobLocator` then we would set the jobExecution deployed status to `false`
  - If the job name doesn't exist in the `JobDefinitionRepository` at all,
then we would set the deployed/deleted status to `false`
- At the web UI:
  - Add the label to denote the deployed/deleted status at the
JobExecutions list page
- Fix tests
But we needed to perform this check to make sure the job definition exists. Instead of querying against the `JobDefinitionRepository` for each job name, I thought this is better :-)