[Publication Module] Duplicate Lead Investigator Email Issue

[sruthymathew123]

Brief summary of changes

Lead Investigator email should be unique for each publication. Same name can be there; but email should be different to uniquely identify publication. So fixing the code to work in that way and fix the duplicate entry '***' for key 'UK_publication_collaborator_Email issue.

Link(s) to related issue(s)

• Resolves #9702

[sruthymathew123]

@racostas For HBCD project, we are not using this module. So I don't know about the use cases; I was just trying to focus only on the error reported. I am ok with making the required change once approved. At present, I can see the current use case expects unique lead investigator email.

[racostas]

Per discussion today:

• We can have the many project to many Lead Investigator feature in a new PR (this feature is highly desirable)
• We can merge this PR that fixes the 500 error ( issue originally reported).

[driusan]

@sruthymathew123 can you fix the branch on this?

[sruthymathew123]

@driusan done