Preliminary attempt at exporting mrna data using hibernate
Working implementation of MRNA export. Everything seems to work, but it's not using core-API yet.
wip
wip
wip
reverted back to original rc2_dev setting
Implement filtering of clinical data export

The implementation is not yet wired up to the controller.
Add new highdim metadata to the metadata service/controller
Export connection to controllers + small fixes

The data export should now be working completely, except that I am now inserting a json object into the
request in the DataExportController as a placeholder as long as the frontend isn't there.
SAN-214 Adjust UI to show new datatypes for exporting

The backend now retrieves the data counts using the core-api, and is
able to show counts for all new datatypes
Connected the export frontend to the backend, so the chosen options are used for exporting.
remove my TestClass from tree
Use dataProperties/rowProperties from projection instead of datatype resource
minor fixes for exporting all hd types
minor fix to also export clinical data again
Merge branch 'features/SAN-200_export_all_data' into rc2_dev