upgrade: Fix phone number scrambled on upgrade
upgrade: Avoid creating unnecessary index

There's a unique index on %user_email.address, so there's no need to create
an index on %ticket.email when matching up records.
Merge pull request #190 from greezybacon/hotfix/phone-number-scramble

upgrade: Fix phone number scrambled on upgrade

Reviewed-By: Peter Rotich <peter@osticket.com>