Add DataNodeNotFoundException to deleteDataNodes

Current implementation of NCMP handle de-registration relies on
DataNodeNotFoundException being thrown to report errors.

- Make deleteDataNodes throw DataNodeFoundExceptionBatch
- Update performance test timings

Issue-ID: CPS-1481
Signed-off-by: danielhanrahan <daniel.hanrahan@est.tech>
Change-Id: Ib833bdb4a23d24e1784bdaf4e5e5e8a9acb41c54
5 files changed