Description of problem:
When I delete a sync plan with associated product(s) and repo(s), the pulp repos are still synced underneath like the plan would still exist.

The cause is, katello does not delete the sync plan but updates it, since pulp_rest debugs show:

2018-06-11 13:40:29  [katello/pulp_rest] [D] RestClient.put "https://pmoravec-sat63.gsslab.brq2.redhat.com/pulp/api/v2/repositories/a89a3c32-9c85-40e8-b22c-0cf3411911be/importers/yum_importer/schedules/sync/5b1ce0b3a0ad7a17858344d9/", "{\"schedule\":\"2018-06-11T14:00:00+02:00/PT1H\",\"enabled\":true}", "Accept"=>"*/*; q=0.5, application/xml", "Accept-Encoding"=>"gzip, deflate", "Content-Length"=>"60", "accept"=>"application/json", "content_type"=>"application/json"


See e.g. enabled:true. Rather DELETE op per https://docs.pulpproject.org/dev-guide/integration/rest-api/repo/sync.html#deleting-a-scheduled-sync should be used.

And pulp mongo_database really still has a record in scheduled_calls collection.

Even removing a sync plan that has not been executed is affected the same.



Version-Release number of selected component (if applicable):
Sat 6.3.1
tfm-rubygem-katello-3.4.5.64-1.el7sat.noarch


How reproducible:
100%


Steps to Reproduce:
1. Create a sync plan, add some product there
2. Delete the sync plan (even before it is executed for the 1st time)
3. Create a sync plan, add some product there, wait for its 1st (or 2nd or even more, if patient) execution
4. Delete the sync plan
5. Check on next sync plans expected execution if underlying repos will be synced / Monitor -> Tasks will have " Scheduled Synchronization repository .." tasks


Actual results:
5. Both sync plans from 1 and 3 steps are still executed, despite they have been deleted.


Expected results:
5. no further execution of sync plans after their removal


Additional info: