Description of problem:
https://pulp-dev-guide.readthedocs.org/en/latest/conventions/sync-v-async.html?highlight=call%20report#call-report

Call Report contains too much information, i.e. it shows in the 'spawned tasks' the task report itself.

Version-Release number of selected component (if applicable):
2.4.1-0.1.alpha


$ curl -H "Accept: application/json" -X POST -k -u admin:admin  -d '{"repo_id":"test_repo","distributor_id":"yum_distributor"}' 'https://example.com/pulp/api/v2/consumers/test_consumer/bindings/'| python -m json.tool
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   967  100   909  100    58    878     56  0:00:01  0:00:01 --:--:--   879
{
    "error": null,
    "result": {
        "_id": {
            "$oid": "53ec853fc91e3112065e4c25"
        },
        "_ns": "consumer_bindings",
        "binding_config": {},
        "consumer_actions": [],
        "consumer_id": "test_consumer",
        "deleted": false,
        "distributor_id": "yum_distributor",
        "id": "53ec853fc91e3112065e4c25",
        "notify_agent": true,
        "repo_id": "test_repo"
    },
    "spawned_tasks": [
        {
            "_href": "/pulp/api/v2/tasks/f7343368-f0e2-4877-9533-0ab524095480/",
            "_id": {
                "$oid": "53ec9cc9c91e3112065e4c2d"
            },
            "_ns": "task_status",
            "error": null,
            "exception": null,
            "finish_time": null,
            "id": "53ec9cc9c91e3112065e4c2d",
            "progress_report": {},
            "queue": "agent",
            "result": null,
            "spawned_tasks": [],
            "start_time": null,
            "state": "waiting",
            "tags": [
                "pulp:consumer:test_consumer",
                "pulp:repository:test_repo",
                "pulp:repository_distributor:yum_distributor",
                "pulp:action:agent_bind"
            ],
            "task_id": "f7343368-f0e2-4877-9533-0ab524095480",
            "task_type": null,
            "traceback": null
        }
    ]
}

How reproducible:


Steps to Reproduce:
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Actual results:


Expected results:


Additional info: