ListenOnCandlepinEvents task is gone, `dynflowd` service restart does not help

Issue

• no running task with label Actions::Candlepin::ListenOnCandlepinEvents is present
• no running task with label Actions::Katello::EventQueue::Monitor is present
• candlepin is optionally in Suspended mode (or will likely enter soon, as katello_event_queue gets filled)
• restarting service dynflowd (originally named as foreman-tasks) does not kick off a new instance of these tasks