Swagger fixes

• https://icatplus.esrf.fr/api-docs/#/Catalogue/get_catalogue__sessionId__investigation

I see as required the instrumentName but I do not think it is required

• https://icatplus.esrf.fr/api-docs/#/DataAcquisition/post_dataacquisition__apiKey__mint authors it not a string, but an array of objects

• https://icatplus.esrf.fr/api-docs/#/Catalogue/get_catalogue__sessionId__samples

instrumentName is not required

• https://icatplus.esrf.fr/api-docs/#/Tracking/get_tracking__sessionId__parcel

does not contain investigation