only show email portion system email via Harvesting #3619

[pdurbin]

What this PR does / why we need it:

Avoids OAI-PMH validation errors like this:

In my local testing, before making this pull request, I was seeing output like this...

<adminEmail>Support2 &lt;[email protected]&gt;</adminEmail>

... from http://localhost:8080/oai?verb=Identify

Which issue(s) this PR closes:

Closes #3619

Special notes for your reviewer:

Suggestions on how to test this:

If you do something like this...

curl -X PUT -d "Support2 [email protected]" http://localhost:8080/api/admin/settings/:SystemEmail

... and then stop and start Glassfish (required to see the change, apparently) and then look for "adminEmail in the output of http://localhost:8080/oai?verb=Identify (or equivalent for your server) you should only see the email portion ([email protected]) of :SystemEmail, without the "personal name" (Support2).

To test if Dataverse validates in terms of OAI-PMH, I'd suggest using http://oval.base-search.net where the screenshot above comes from.

Does this PR introduce a user interface change?:

No.

Is there a release notes update needed for this change?:

Probably not worth it.

Additional documentation:

I put a line in the guides, the section on setting up a harvesting server.

[coveralls]

Coverage remained the same at 19.504% when pulling e5d2ee2 on 3619-harvesting-admin-email into dcf0b48 on develop.

[kcondon]

This fixes the angle bracket in systememail issue. Test data should be: curl -X PUT -d "Support2 [email protected]" http://localhost:8080/api/admin/settings/:SystemEmail

My test env does not validate using the specified service but that is outside the scope of this ticket: