Description of problem:
Task created for the import upload into a repo cannot handle properly exceptions.
$ curl -H "Accept: application/json" -X GET -k -u admin:admin 'https://example.com/pulp/api/v2/tasks/5f8aa1f1-5d77-408b-8d6f-822afaa38cf5/'|python -m json.tool
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  1658  100  1658    0     0   1583      0  0:00:01  0:00:01 --:--:--  1585
{
    "_href": "/pulp/api/v2/tasks/5f8aa1f1-5d77-408b-8d6f-822afaa38cf5/",
    "_id": {
        "$oid": "538d98df0c759879a2927ae1"
    },
    "_ns": "task_status",
    "error": {
        "code": "PLP0000",
        "data": {},
        "description": "Pulp exception occurred: PulpExecutionException",
        "sub_errors": []
    },
    "exception": null,
    "finish_time": "2014-06-03T09:43:59Z",
    "id": "538d98df591d260bedb7bbbd",
    "progress_report": {},
    "queue": "reserved_resource_worker-0.dq",
    "result": null,
    "spawned_tasks": [],
    "start_time": "2014-06-03T09:43:59Z",
    "state": "error",
    "tags": [
        "pulp:repository:isorepo",
        "pulp:action:import_upload"
    ],
    "task_id": "5f8aa1f1-5d77-408b-8d6f-822afaa38cf5",
    "task_type": "pulp.server.managers.content.upload.import_uploaded_unit",
    "traceback": "Traceback (most recent call last):\n  File \"/usr/lib/python2.7/site-packages/celery/app/trace.py\", line 240, in trace_task\n    R = retval = fun(*args, **kwargs)\n  File \"/usr/lib/python2.7/site-packages/pulp/server/async/tasks.py\", line 321, in __call__\n    return super(Task, self).__call__(*args, **kwargs)\n  File \"/usr/lib/python2.7/site-packages/celery/app/trace.py\", line 437, in __protected_call__\n    return self.run(*args, **kwargs)\n  File \"/usr/lib/python2.7/site-packages/pulp/server/managers/content/upload.py\", line 223, in import_uploaded_unit\n    unit_metadata, file_path, conduit, call_config)\n  File \"/usr/lib/python2.7/site-packages/pulp_rpm/plugins/importers/iso/importer.py\", line 120, in upload_unit\n    iso = models.ISO(unit_key['name'], unit_key['size'], unit_key['checksum'])\nPulpExecutionException: Pulp exception occurred: PulpExecutionException\n"
}

$ curl -H "Accept: application/json" -X GET -k -u admin:admin 'https://example.com/pulp/api/v2/tasks/6a3b6aee-3636-4179-be96-f4a66975d669/'|python -m json.tool
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  1620  100  1620    0     0   1579      0  0:00:01  0:00:01 --:--:--  1582
{
    "_href": "/pulp/api/v2/tasks/6a3b6aee-3636-4179-be96-f4a66975d669/",
    "_id": {
        "$oid": "538d99270c759879a2927ae3"
    },
    "_ns": "task_status",
    "error": {
        "code": "PLP0000",
        "data": {},
        "description": "Invalid unit type for repository",
        "sub_errors": []
    },
    "exception": null,
    "finish_time": "2014-06-03T09:45:11Z",
    "id": "538d9927591d260bedb7bbbe",
    "progress_report": {},
    "queue": "reserved_resource_worker-0.dq",
    "result": null,
    "spawned_tasks": [],
    "start_time": "2014-06-03T09:45:11Z",
    "state": "error",
    "tags": [
        "pulp:repository:rpmrepo",
        "pulp:action:import_upload"
    ],
    "task_id": "6a3b6aee-3636-4179-be96-f4a66975d669",
    "task_type": "pulp.server.managers.content.upload.import_uploaded_unit",
    "traceback": "Traceback (most recent call last):\n  File \"/usr/lib/python2.7/site-packages/celery/app/trace.py\", line 240, in trace_task\n    R = retval = fun(*args, **kwargs)\n  File \"/usr/lib/python2.7/site-packages/pulp/server/async/tasks.py\", line 321, in __call__\n    return super(Task, self).__call__(*args, **kwargs)\n  File \"/usr/lib/python2.7/site-packages/celery/app/trace.py\", line 437, in __protected_call__\n    return self.run(*args, **kwargs)\n  File \"/usr/lib/python2.7/site-packages/pulp/server/managers/content/upload.py\", line 195, in import_uploaded_unit\n    ContentUploadManager.is_valid_upload(repo_id, unit_type_id)\n  File \"/usr/lib/python2.7/site-packages/pulp/server/managers/content/upload.py\", line 164, in is_valid_upload\n    raise PulpDataException('Invalid unit type for repository')\nPulpDataException: Invalid unit type for repository\n"
}

Version-Release number of selected component (if applicable):
2.4.0-0.19.beta

How reproducible:


Steps to Reproduce:
1.
2.
3.

Actual results:
traceback and no http_status

Expected results:
http_status and no traceback

Additional info: