Update Merchant Support functionality to send email as Reseller User

Currently, when a user submits a support ticket through Reseller UI's merchant support tab, the ticket gets created in Zendesk from user "noreply@admaxlocal.com".

We need to change the ticket creation email to the email of the reseller user submitting the ticket.

This will then allow us to auto assign the tickets in Zendesk to the ticket submitter's email address. Also the Reseller user will get a ticket creation confirmation email from Zendesk.