LocationError: (None, 'name') when merging an account with a NEW email address

MergePeopleView.initialize() uses PersonSet.getByEmail() in a way that won't find people by a NEW email address, causing merges of unactivated accounts to fail like OOPS-e2f5d3b6769c012de049daf4a60c0941.

This is basically the same as bug #1019975, just at a later stage.

Admins can work around this by manually setting the account to Active on +reviewaccount, and doing the merge through https://launchpad.net/people/+adminpeoplemerge after verifying ownership (eg. by seeing that the requesting user was able to trigger this OOPS, as it occurs after the email confirmation).