Duplicate Protocol names in studies generated from Datascriptor

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When an ISA study object is generated from Datascriptor (using isatools.create.connectors.generate_study_design()):

• if two or more assays have the same protocol in common, then the resulting study will have conflicting names.

The protocol name should also contain the Assay type identifier (i.e. its id, name, or an abbreviation) to make sure that Protocol.name is unique.

This could have to be fixed here: https://github.com/ISA-tools/isa-api/blob/master/isatools/create/model.py#L1120 (at the level of the AssayGraph. generate_assay_plan_from_dict() )

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This should be fixed with #405