Test that pulp to pulp sync for python packages work

[preethit]

https://pulp.plan.io/issues/140

1. Create python repoA with feed

2. Sync repoA

3. Create repoB with --feed repoA

4. Run Sync
   Assert: Sync is success

5. Create python repoA with no feed

6. Upload content to the repo

7. Publish the repo

8. Create repoB with --feed repoA

9. Run Sync
   Assert: Sync is success

[Ichimonji10]

@dkliban clarified that, for this issue to be fully tested, we need to sync from one Pulp application to another completely independent Pulp application.