Merge lp://staging/~sinzui/launchpad/merge-person-notifications-0 into lp://staging/launchpad

Migrate registry notifcations to lp.registry.

    Launchpad bug: https://bugs.launchpad.net/bugs/732059
    Pre-implementation: no one
    Test command: ./bin/test -vv \
      -t test_teammembership -t test_personnotification
      -t mailinglist-enail-notification -t message-holds
      -t person-notification -t teammembership-email-notification
      -t user-to-user -t TestMMCfgLaunchpadConfigTestCase

Most of the email templates in canonical.launchpad are used exclusively by
lp.registry. These files should be moved before one is edited or added, such
as when working on bug 728471.

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RULES

    * Extract the registry mail notifications to lp.registry.mail.notification
    * Move the templates to lp.registry.emailtemplates
    * Update the calls to get_email_template() to pass app='registry'
    * ADDENDUM: Moved the mailman email template to lp.services.mailman

QA

    None. This is a pure refactoring

LINT

    lib/canonical/launchpad/mailnotification.py
    lib/lp/registry/configure.zcml
    lib/lp/registry/mail/
    lib/lp/registry/browser/person.py
    lib/lp/registry/browser/product.py
    lib/lp/registry/mail/__init__.py
    lib/lp/registry/mail/notification.py
    lib/lp/registry/model/distributionmirror.py
    lib/lp/registry/model/person.py
    lib/lp/registry/model/persontransferjob.py
    lib/lp/registry/model/teammembership.py
    lib/lp/services/mailman/monkeypatches/__init__.py
    lib/lp/services/mailman/monkeypatches/emailtemplates/