[MERGE] Handle tags when copying between repos during reconfigure.

[Aaron Bentley]

Aaron Bentley has voted resubmit.
Status is now: Resubmit
Comment:
fetch_branch is a public API, therefore it need a unit test in 
tests.per_repository.

It would also be better to use fetch_spec instead of doing repeated 
fetches, but that's not needed to land this.

For details, see: 
http://bundlebuggy.aaronbentley.com/project/bzr/request/%3C49F083E5.4050604%40gmx.net%3E
Project: Bazaar