Update calls, delete unused variable
Update calls, delete unused variable

Update function calls as suggested by Swen Vermeul:

- `get_sample` rather than `get_samples`,
- `get_projects(space='IMV', code='METAGENOMICS)`.

`run_sample` is not needed as it is not mapped.

medvir/DMS,medvir/DMS,medvir/openBIS