RPM Support

Description of problem: When I pass nonsense keys to the yum importer, it happily takes them. When I do the same thing to the distributor, it results in a traceback.

Version-Release number of selected component (if applicable): master

How reproducible: always

Steps to Reproduce:
1. Create a test repository: pulp-admin rpm repo create --repo-id zoo --feed https://repos.fedorapeople.org/repos/pulp/pulp/demo_repos/zoo/

2. Update the distributor: curl -i -H "Accept: application/json" -X PUT -d '{ "distributor_config": {"NOTAKEY":"NOTAVALUE"}}' -u admin:admin -k 'https://localhost/pulp/api/v2/repositories/zoo/distributors/yum_distributor/'

3. Retrieve the resulting task: curl -i -H "Accept: application/json" -X GET -u admin:admin -k 'https://localhost/pulp/api/v2/tasks/\<task-id>/'

4. Update the importer: curl -i -H "Accept: application/json" -X PUT -d '{ "importer_config": {"NOTAKEY":"NOTAVALUE"}}' -u admin:admin -k 'https://localhost/pulp/api/v2/repositories/zoo/importers/yum_importer/'

5. Retrieve the resulting task: curl -i -H "Accept: application/json" -X GET -u admin:admin -k 'https://localhost/pulp/api/v2/tasks/\<task-id>/'

Actual results:
Distributor results:
{
"_href": "/pulp/api/v2/tasks/52d953d4-3d7c-4b5e-8b15-02c0bf84ae05/",
"_id": {
"$oid": "53e3a2cab53073e66875f0ed"
},
"_ns": "task_status",
"error": {
"code": "PLP0000",
"data": {},
"description": "Configuration key [NOTAKEY] is not supported",
"sub_errors": []
},
"exception": null,
"finish_time": "2014-08-07T16:01:14Z",
"id": "53e3a2ca7bc8f6604cd176ca",
"progress_report": {},
"queue": "reserved_resource_worker-4@jcline.redhat.com.dq",
"result": null,
"spawned_tasks": [],
"start_time": "2014-08-07T16:01:14Z",
"state": "error",
"tags": [
"pulp:repository:zoo",
"pulp:repository_distributor:yum_distributor",
"pulp:action:update_distributor"
],
"task_id": "52d953d4-3d7c-4b5e-8b15-02c0bf84ae05",
"task_type": "pulp.server.tasks.repository.distributor_update",
"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 \"/home/jcline/devel/pulp/server/pulp/server/async/tasks.py\", line 306, 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 \"/home/jcline/devel/pulp/server/pulp/server/tasks/repository.py\", line 143, in distributor_update\n distributor = manager.update_distributor_config(repo_id, distributor_id, config, auto_publish)\n File \"/home/jcline/devel/pulp/server/pulp/server/managers/repo/distributor.py\", line 333, in update_distributor_config\n raise PulpDataException(message)\nPulpDataException: Configuration key [NOTAKEY] is not supported\n"
}

Importer results:
{
"_href": "/pulp/api/v2/tasks/cb0d38a4-d11f-4bb9-8dd1-dccf5163e33c/",
"_id": {
"$oid": "53e3a275b53073e66875f0ec"
},
"_ns": "task_status",
"error": null,
"exception": null,
"finish_time": "2014-08-07T15:59:49Z",
"id": "53e3a2757bc8f6604cd176c9",
"progress_report": {},
"queue": "reserved_resource_worker-2@jcline.redhat.com.dq",
"result": {
"_id": {
"$oid": "53e267d17bc8f602856d69c0"
},
"_ns": "repo_importers",
"config": {
"NOTAKEY": "NOTAVALUE",
"feed": "https://repos.fedorapeople.org/repos/pulp/pulp/demo_repos/zoo/"
},
"id": "yum_importer",
"importer_type_id": "yum_importer",
"last_sync": "2014-08-06T20:11:47Z",
"repo_id": "zoo",
"scheduled_syncs": [],
"scratchpad": null
},
"spawned_tasks": [],
"start_time": "2014-08-07T15:59:49Z",
"state": "finished",
"tags": [
"pulp:repository:zoo",
"pulp:repository_importer:yum_importer",
"pulp:action:update_importer"
],
"task_id": "cb0d38a4-d11f-4bb9-8dd1-dccf5163e33c",
"task_type": "pulp.server.managers.repo.importer.update_importer_config",
"traceback": null
}

Expected results: Either both accept unused keys, or both do not.

Additional info:

+ This bug was cloned from Bugzilla Bug #1127861 +