Description
This PR changes the webservice's DOI generation logic so that it will generate a DOI for a Workflow with no author in the metadata. Essentially, we revert to the pre-1.14 behavior, wherein a filler author is used when no author exists, except that now, we use the Workflow's organization as the filler author's name.

Review Instructions
Create a valid tagged version without an author on a published workflow, and confirm that an automatic DOI is generated, and that the DOI author name matches the workflow's organization.

Issue
https://ucsc-cgl.atlassian.net/browse/SEAB-6995

Security and Privacy

If there are any concerns that require extra attention from the security team, highlight them here and check the box when complete.

• Security and Privacy assessed

e.g. Does this change...

• Any user data we collect, or data location?
• Access control, authentication or authorization?
• Encryption features?

Please make sure that you've checked the following before submitting your pull request. Thanks!

• Check that you pass the basic style checks and unit tests by running mvn clean install
• Ensure that the PR targets the correct branch. Check the milestone or fix version of the ticket.
• Follow the existing JPA patterns for queries, using named parameters, to avoid SQL injection
• If you are changing dependencies, check the Snyk status check or the dashboard to ensure you are not introducing new high/critical vulnerabilities
• Assume that inputs to the API can be malicious, and sanitize and/or check for Denial of Service type values, e.g., massive sizes
• Do not serve user-uploaded binary images through the Dockstore API
• Ensure that endpoints that only allow privileged access enforce that with the @RolesAllowed annotation
• Do not create cookies, although this may change in the future
• If this PR is for a user-facing feature, create and link a documentation ticket for this feature (usually in the same milestone as the linked issue). Style points if you create a documentation PR directly and link that instead.