allow publishing and OpenAire export when first name is missing for author #7059

[pdurbin]

What this PR does / why we need it:

If the author is entered with an empty comma-separated first name, like this: "Smith," it results in a fatal error in the OpenAire export, making it impossible to publish the dataset.

Which issue(s) this PR closes:

Closes #7059

Special notes for your reviewer:

An ArrayIndexOutOfBoundsException was being thrown.

Suggestions on how to test this:

For me, it wasn't enough to type "Smith," as the author name. I had to turn on ORCID (no ORCID ID required) like this:

(There's existing logic in the code that the presence of an ORCID indicates a person rather than an organization.)

The expected behavior:

• You are able to publish the dataset.
• A log entry like this: [2020-07-17T14:39:26.076-0400] [Payara 5.201] [INFO] [] [edu.harvard.iq.dataverse.export.openaire.OpenAireExportUtil] ... [[Unable to write givenName and familyName based on creatorName 'Smith, '.]]
• As the log states, no givenName or familyName present in the OpenAire export.

Does this PR introduce a user interface change? If mockups are available, please link/include them here:

No.

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

No. Just a bug fix. An ArrayIndexOutOfBoundsException was being thrown and now there is an additional check on the size of the array before indexing into it.

Additional documentation:

None.

[coveralls]

Coverage increased (+0.002%) to 19.612% when pulling f3f7a38 on 7059-openaire into 941d17d on develop.

[sekmiller]

Looks reasonable and works in practice.