[OWL-1697][nqm-mng] Fix a test
[OWL-1697][nqm-mng] Fix a test

`NotNewNqmAgent()` was removed so the test should have been fixed.

masato25/open-falcon-backend,masato25/open-falcon-backend,Cepave/open-falcon-backend,masato25/open-falcon-backend,Cepave/open-falcon-backend,Cepave/open-falcon-backend,masato25/open-falcon-backend,Cepave/open-falcon-backend,Cepave/open-falcon-backend,masato25/open-falcon-backend,Cepave/open-falcon-backend,masato25/open-falcon-backend