Resolve "Retrieve the datasets by dataset type"

Closes #321 (closed)

This endpoint is marked as deprecated:

/catalogue/{sessionId}/investigation/id/{investigationId}/dataset
/catalogue/{sessionId}/dataset/id/{datasetIds}/dataset

in favor of:

/catalogue/{sessionId}/dataset?investigationId=
/catalogue/{sessionId}/dataset?datasetIds=

Added datasetType parameter: [acquisition, processed] Example:

/catalogue/{sessionId}/dataset?investigationId1234&datasetType=processed