mnpptnid can cause disproportionate amount of distracting warnings

[PatrickRWright]

Is your feature request related to a problem? Please describe.
If a secuTrial database user is added more than once (should not happen but does) or there are users with the same real name (e.g. John Smith, Peter Müller), then factorize_secuTrial() will throw many warnings in regard to duplications in value factorization. This creates a lot of noise and conceals important warnings.

Describe the solution you'd like
Add an exception that doesn't warn if the duplication warning is triggered because of mnpptnid.

Describe alternatives you've considered
Remove the "Duplicate values found during factorization of " all together. Its better not to do this.