Cleanup zone in test_share_imported_zone

the test was removing the zone import it created, but not the zone
that was created during import.

Related-Issue: PRODX-40358
Change-Id: I15cc7e75bfbdcc362322d5ff51f42d538eff55c0
(cherry picked from commit 6f01230aec05c4fb48c8d942a5182f7521f27d81)
1 file changed