Verify that skipping used IDs works for:
- PFCP UP-SEID
- GTP local TEID
- chain_id for nft rulesets -- so far expected to fail,
fix follows in I139b46de0bd15185a7a06109d55f7c759755ec81.
Related: OS#5900
Change-Id: I36acff15f22d23ade4d281c2af3eb117dfc10359