Code review comment for lp:~inspirated/launchpad/export-Person-getBugSubscriberPackages

Added new doctest in revision #11012.

$ bin/test -cvvt xx-person.txt
Running tests at level 1
Running canonical.testing.layers.PageTestLayer tests:
  Set up canonical.testing.layers.BaseLayer in 0.033 seconds.
  Set up canonical.testing.layers.DatabaseLayer in 1.283 seconds.
  Set up canonical.testing.layers.LibrarianLayer in 14.543 seconds.
  Set up canonical.testing.layers.MemcachedLayer in 0.186 seconds.
  Set up canonical.testing.layers.LaunchpadLayer in 0.000 seconds.
  Set up canonical.testing.layers.FunctionalLayer in 9.068 seconds.
  Set up canonical.testing.layers.LaunchpadFunctionalLayer in 0.000 seconds.
  Set up canonical.testing.layers.GoogleServiceLayer in 4.523 seconds.
  Set up canonical.testing.layers.PageTestLayer in 0.011 seconds.
  Running:
 lib/lp/registry/tests/../stories/webservice/xx-person.txt
  Ran 53 tests with 0 failures and 0 errors in 59.176 seconds.
Tearing down left over layers:
  Tear down canonical.testing.layers.PageTestLayer in 0.000 seconds.
  Tear down canonical.testing.layers.LaunchpadFunctionalLayer in 0.000 seconds.
  Tear down canonical.testing.layers.LaunchpadLayer in 0.000 seconds.
  Tear down canonical.testing.layers.LibrarianLayer in 0.006 seconds.
  Tear down canonical.testing.layers.MemcachedLayer in 0.103 seconds.
  Tear down canonical.testing.layers.GoogleServiceLayer in 0.312 seconds.
  Tear down canonical.testing.layers.FunctionalLayer ... not supported
  Tear down canonical.testing.layers.DatabaseLayer in 0.218 seconds.
  Tear down canonical.testing.layers.BaseLayer in 0.000 seconds.