Persist the Interaction according to its PSI description.
A Shortlabel is automatically generated based on
the gene names of the participant, if no gene name are available we use the protein AC.
can be linked to multiple experiment in PSI, we do take it into account and we manages cases where an interaction
already exists, attached to one Experiment (let's call it E1) and the same interaction is also declared in the
PSI file as interacting in E1 and E2, in which case we just create an extra interaction and link it to E2.
So far, we do not automatically link several Experiment to a single Interaction using the PSI loader.