Katello-agent showing as failed in "hammer ping", how to disable? in Red Hat Satellite 6

Issue

• After upgrading Satellite 6.9 to 6.10 & 6.11, katello-agent is removed as it is not used. In "hammer ping", it is shown as failed:

# hammer ping
database:
    Status:          ok
    Server Response: Duration: 0ms
katello_agent:
    Status:          FAIL        <=================================
    message:         Not running
    Server Response: Duration: 1ms
candlepin:
    Status:          ok
    Server Response: Duration: 16ms
candlepin_auth:
    Status:          ok
    Server Response: Duration: 16ms
candlepin_events:
    Status:          ok
    message:         1 Processed, 0 Failed
    Server Response: Duration: 0ms
katello_events:
    Status:          ok
    message:         0 Processed, 0 Failed
    Server Response: Duration: 0ms
pulp3:
    Status:          ok
    Server Response: Duration: 237ms
pulp3_content:
    Status:          ok
    Server Response: Duration: 161ms
foreman_tasks:
    Status:          ok
    Server Response: Duration: 3ms