Move integration test (DataService)

- dropped ri module coverage to alow for move
- removed performance tests (already better tests in intergration module)
- added 'save' iue cases in new integration-test
- removed no longer used version for save single data node
(todo: remove old tests for similar functionality, will wait until new test cover same)

Issue-ID: CPS-1687
Signed-off-by: ToineSiebelink <toine.siebelink@est.tech>
Change-Id: I4c2e788e0a313938a923cd1e7e52584d739ec6f4
6 files changed