[Issue 200] Port custom emails

[Dbreck-TAMU]

References

• Fixes Issue #200

Description

Ported several TAMU email templates into DSpace 7_x.

[jcreel]

Keep this as draft pending the investigation described in the note "[DSpace] [SPIKE] Verify that customized email templates are being utilized by the server".

We are unsure whether the three extra migrated templates will get invoked by the 7.x code. But they all serve important purposes so we need to be sure of what replaces them if they are not getting invoked.

[wwelling]

Please check if subscription template file is different from subscriptions_content.

Check if subscriptions_content is acceptably comparable to legacy subscription.

Please remove subscription and modify subscriptions_content accordingly if necessary.

https://github.com/TAMULib/DSpace/tree/tamu-dspace-7_x/dspace/config/emails

The alumni_request email template can be ported over with TAMULib/dspace-angular#29.

Unrelated to this PR:
Missing local based file support for email here with public constant pointing the healthcheck email template. Not sure why I18nUtil.getEmailFilename function was not used within Email.getEmail.