move code for mail domain's owner change to plugin

Sergio Cambra

2014-07-04 6f4f7dbd37f50dc2bf0bdaf3d035806d4378bf0b

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ALTER TABLE `client` ADD `customer_no` VARCHAR( 64 ) NULL AFTER `contact_name` , ADD `vat_id` VARCHAR( 64 ) NULL AFTER `customer_no`;