Testing for the ability of the security team to copy any package into the Security pocket should be moved from test_distroseries to test_copypackage.

[Raphaël Badin]

The security team needs to be able to copy any package into the Security pocket, even if they lack upload privileges. And *only* the security team can be permitted to use syncSource into the primary archive, since it bypasses the queue and announcements.

This test is currently done in lib/lp/registry/browser/tests/test_distroseries.py (test_sync_append_main_archive). It should be refactored and moved to lib/lp/soyuz/scripts/tests/test_copypackage.py.

This work will be part of the refactoring of the code used for syncing sources.