Task/392 service path service path unit tests

### Description
- Unit tests for queryContext
- Initial sanity check of Service Path, with corresponding unit tests

Not sure if the preparation of this test is correct... You should to DB e.g.:

* E1, T1, /home/kz, A1=val1
* E1, T1, /home/fermin, A2=val2

The query E1,T1,/home/kz and check that only the first one is returned.